reservoirs

Two Tajo reservoirs have more water than the 12 Segura reservoirs combined. And that is why Murcia is going to beat Castilla-La Mancha again

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And not a little more water, no. Much more. Because, let’s be honest, since 1979, when the transfer was opened, the Entrepeñas and Buendía reservoirs so much accumulated water has never been seen there: we are talking about reserves of 1,649 hm3. On the other hand, a little further to the southeast, the entire Segura basin has 52 hm3. That is, an almost exact third. These are just a couple of pieces of information, but they are enough to explain why, although the Community Board of Castilla La Mancha sue the Central Government180 hm3 of water from the Tagus will end up in the Segura before the end of the quarter. On autopilot. On March 13, 2026, the Central Transfer Exploitation Commission approved that shipment. The current regulations do not give much room for maneuver: the headwaters of the Tagus entered Level 1 months ago and that, with the current rules, means activating the transfer of water resources. The problem is that the rules have been out of date for years and, in fact, the proposed modification (more favorable to the interests of the Tagus) has been stalled in the Supreme Court for months. And it is still curious that rules designed for a scenario with little water generate problems, precisely, when there is more water. What does Castilla – La Mancha complain about? The most obvious thing is that the Government is manifestly failing to comply with the Royal Hydrographic Planning Decree: According to the text, the new regulations were to be in force in February 2024. That is, we are two years late. And this delay is not innocuous: the Board maintains that the current rules do not ensure the environmental protection of the Tagus or all the associated Natura 2000 network spaces. At the end of the day, they point out from Toledo, what the Exploitation Commission has approved “it wastes 11% of the impounded water” at the head of the river. And what happens in Murcia? We already said months ago that Murcia (and the southeast in general) They had already assumed that depending on transfers It was something very committed. It is true that the expansion of some desalination plants has been approved and is working in construction from others, but the tenders are very slow. This time gap is not only a problem for irrigators, it is a ticking bomb for the different administrations involved. After all, the elections are just around the corner. What can we expect? This is the simplest part of the matter: as long as the Supreme Court does not get its act together or the Ministry decides to take action on the matter, the transfers will continue to occur automatically “as if nothing had happened.” That is to say, the irrigators of the Segura are going to win (again and again) over the riverside municipalities of the Tagus. It doesn’t matter how much politicians stage things. The conflict between regions is in the very core of the country: in the water that runs through its ‘veins’. Image | untypographic In Xataka | The Tagus reservoirs have reached their maximum level. The response of the authorities has been to empty them immediately

The Tagus reservoirs have reached their maximum level. The response of the authorities has been to empty them immediately

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1,639.67 hm3 of water. That is what the Entrepeñas and Buendía reservoirs store today at the head of the Tagus. This means that they have reached 65.11% of their capacity (compared to 48.52% last year) and, more importantly, that have reached level 1the maximum possible step. Finally, some good news! After years of hardship, the river has reached its “dream level.” Then, we are going to empty it. As? This same week, the Tajo-Segura Transfer Exploitation Commission is going to propose sending 180 hm3 of water to the Segura basin. It will be done in stages over three months. And the truth is that it was something totally predictable: the growth of reserves in the headwaters of the river has reached milestones that we have not seen since the late 90s. In application of the transfer rules that were set in 2013the irrigators of Segura request that the necessary procedures be activated so that they can give them the water that is theirs. What happens is that the political mess is enormous. What is happening with the water of the Tagus? Basically, by virtue of the Tagus Hydrological Plan, approved in 2023the transfer rules had to be updated to adapt them to the current reality. It has been tried; late, but it has been tried. What happens is that the process (due to the enormous political costs it entails) has been stalled for months and months. Right now, he is stopped waiting for pending resolutions in the Supreme Court. This has generated a very complicated situation: the plan that was going to be approved included a progressive reduction of transfers up to 40% in the next five years. The stated intention was recover the Tagus River and look for management formats that do not focus on specific moments (“emptying the pantry just when we have finished filling it”), but on more global measures that do not compromise the management of the basins in the medium term. But since it is not approved, the law is clear: Segura can claim its water and the Exploitation Commission will proceed to send it. The central issue is whether all this is a mirage or not. It is not lost on anyone that this January has not been a normal month (it has been the rainiest in the last 25 years) and, for this reason, each of the parties wants to use ‘this gift from heaven‘ for their own interests: some to regenerate the Tagus (and ensure the economic activity linked to it) and the others to keep the Segura agroindustry alive. That is, we have to choose at the worst possible moment: with the elections just around the corner. Image | Maria LVRZ In Xataka | The water from the Tagus is going to stay in Castilla-La Mancha. So Alicante and Murcia already have a plan B: set up desalination plants

An end of February with 20 ºC, haze and full reservoirs is not "good time": it is the sign of a completely misplaced meteorology

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If we take a brief look at how February 2026 is ending (the sun, the 20 degrees, the haze, the candy-like reservoirs), it is difficult not to say to ourselves: “Finally some good weather!” Above all, if we take into account that after these days of calm, a front will enter from the northwest, inaugurating meteorological spring in style. And yet, it is inevitable to raise an eyebrow. But let’s start at the beginning…. The arrival of a front from the northwest is not only synonymous with rain, but with a progressive drop in temperature and the return of the frosts after disappearing for a few days. Of course, the southern half is not going to notice it too much. Otherwise, the haze has been there for days causing problems (and locust rains in the Canary Islands) and, in the background, a DANA starts to give signs about what will approach Andalusia on Monday or Tuesday. In Xataka After the rains, Spain faces the same problem as a year ago: a devastating fire season Where is spring? If that’s the question, the answer is that it’s already here. Not just because this weekend ‘astronomic spring’ beginsbut because the meteorological dynamics have made everything accelerate in a strange way. Neither the processions deceiveneither allergies disappear. And that means the trap is already here. Because, although the reservoirs are full, they are not filled homogeneously. While Spain is at 83%, there are many basins with many problems (the Segura is at 47.2% and that of Júcar at 63.7%). And, starting in March, both evaporative demandas consumption (agricultural irrigation, urban peaks, tourism) skyrocket. Therefore, with the history of poor management that we have in the country and this feeling of “false security” that is spreading, having the reservoirs full unfortunately means nothing. Absolutely nothing. {“videoId”:”x7zoac4″,”autoplay”:false,”title”:”Climate change and the influence of humans”, “tag”:”Earth”, “duration”:”304″} More problems, many problems. To all this we must add that we do not know what is going to happen from now on. We will never know, it is true: but this precipitation scenario is so new and unusual that all scenarios are open. The only thing that is clear is that, if we do not start managing the forest, forest fires are going to mark the country as soon as the heat arrives. The new normal? That is the second big question because the pan-European studies agree that we are going towards an earlier start of spring compared to previous decades. But no one is very clear if this is an anomaly or a first step. What is clear is that, no matter what happens, this is especially noticeable here in the south. And that is the first big question: Are we prepared? Are we willing to do what we have to do? Image |AEMET In Xataka |In China they are deploying metal firefighters. Maybe they are more useful than robo-waiters (function() { window._JS_MODULES = window._JS_MODULES || {}; var headElement = document.getElementsByTagName(‘head’)(0); if (_JS_MODULES.instagram) { var instagramScript = document.createElement(‘script’); instagramScript.src=”https://platform.instagram.com/en_US/embeds.js”; instagramScript.async = true; instagramScript.defer = true; headElement.appendChild(instagramScript); – The news An end of February with 20 ºC, haze and full reservoirs is not “good weather”: it is the sign of a completely misplaced meteorology was originally published in Xataka by Javier Jimenez .

There is so much energy left over that we are using the reservoirs like giant batteries

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Not long ago, the news in Spain was the dust, the dry land and the anguish of starving reservoirs. Today, the story has taken a turn as violent as it was unexpected. The background sound in the Spanish electrical system is no longer the drought alarm, but the roar of the floodgates opening to release excess water. What the meteorology has given in the form of torrential rains during this beginning of 2026 has become a financial paradox: there is so much energy left over that the market, designed to manage scarcity, has begun to show its seams in the face of abundance. The price of electricity has not only dropped; has been broken. A perfect storm. And this time, literally. A succession of Atlantic storms (Goretti, Harry, Ingrid…) and an extraordinarily rainy start to the year They have brought the hydraulic reserve to 77.3%. This scenario has forced hydroelectric plants to work on a piece-rate basis. It is not an option: many are “flow-through” plants, which means they cannot store water and must turbine it to avoid overflows, flooding the electrical grid with cheap energy. This situation has drawn two opposite realities. On the one hand, for households with a regulated (PVPC) or indexed rate, the saying “year of snow, year of goods” is literally fulfilled. The bill plummets thanks to the massive entry of renewables. On the other hand, nuclear energy, designed to operate 24/7 as a base load, has become the collateral victim. The technical data of Red Eléctrica corroborate this trend. In the generation records of February 12, it is observed how nuclear energy remains on a flat line of about 5,770 MW, but operating in an environment where wind energy exceeds 17,000 MW at peak hours, pushing prices down and displacing other technologies. The mechanics of a “broken” market. The excess of water and wind has caused the price of electricity to “break” during the hours of lowest consumption. We’re no longer just talking about the solar “duck curve” at noon; now zero or negative prices also appear at dawn. According to The Spanishin the first ten days of February, 69 hours were accumulated with zero or negative prices. The system is so saturated with energy that it needs “sponges” to absorb it. Here pumping hydroelectricity comes into play (using electricity to raise water from a lower reservoir to a higher one), which acts as the system’s large battery. REE reports They are revealing about it.. During the early hours of February 12, the system recorded massive pumping consumption to prevent the collapse of the network, reaching consumption values ​​(energy withdrawn from the network) greater than 1,800 MW: At 04:05 on February 12, pumping consumption was -1,850 MW. At 04:55 hours, it remained at -1,848 MW. This confirms that Spain is using its reversible reservoirs to “drink” the excess electricity produced by wind and flowing water while demand sleeps. An x-ray of the price. As a result, the wholesale price has plummeted. According to Expansionthe average price for this February 13 is €4.38/MWh in the wholesale market (pool), a ridiculous figure compared to previous years. However, the market presents a time “trap” for the consumer. Although the average is low, the volatility is extreme. OMIE graphs show a flat curve close to zero for almost the entire day, which shoots up vertically at dusk. The valley: On February 12, the price remained practically flat and low for most of the day. The peak (The forbidden hour): When the sun goes down and the photovoltaics stop providing, and coinciding with dinner, the price skyrockets. Between 8:00 p.m. and 9:00 p.m. the most expensive section is concentratedexceeding €35/MWh in the wholesale market, which translates into more than €170/MWh for the final consumer due to tolls and system charges. For the intelligent consumer, the “bargain hours” are now between 3:00 p.m. and 4:00 p.m. (with negative prices in the pool of -€0.03/MWh) and during the early hours of the morning. Forecasts. Is this an anecdote or a trend? The experts consulted by The Energy Newspaper, like Javier Revuelta from the consulting firm AFRYthey believe it is structural. Futures markets (forwards) for March and April are already trading lower (€40 and €25 respectively). The forecast is that 2026 will close with an average price of around €55/MWh. This strongly reopens the energy debate: if renewable energy is capable of covering demand at zero prices, the economic viability of maintaining the nuclear park—which cannot stop and start at will—becomes complicated. The “problem” of full reservoirs is, in reality, the sign that the marginalist electricity market creaks when the raw material is free and abundant. For the citizen, the lesson is clear: electricity is almost free, but only if you know how to look at the clock before turning on the switch. Image | freepik and freepik Xataka | The reservoir that would “never be filled” is opening its floodgates: 23 years later, the largest swamp in Western Europe is completely full

the technical imbalance that is silently killing Spanish reservoirs

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In a window of just 72 hours, Spain’s water reserve has experienced unprecedented growth. The data has gone from 693 cubic hectometers in one day, shooting up to 2,349 hm³ in just three days. However, behind this photograph of abundance and a blue-tinted map of Spain, Greenpeace has warned that we are facing an optical illusion. What we see shining in the sun is water, yes, but what accumulates at the bottom, invisible and silent, is mud. And there are more and more. The denunciation of silent death. The environmental organization Greenpeace has issued an alert: The useful life of Spanish reservoirs is running out. This is not an imminent risk of the concrete walls collapsing – the dams are sound from a civil engineering point of view – but rather what they call a “dramatic loss of operational efficiency.” The underlying problem is the calendar. The bulk of our hydraulic infrastructure was built during the dictatorship (1950-1975). This means, according to the data managed by the organization, that “a large part of the dams is now crossing the threshold of their theoretical project useful life”, estimated between 50 and 75 years. The concrete holds, but the steel mechanisms, such as valves and drains, suffer the passage of time. The physics of “solid avenues.” To understand why reservoirs are losing capacity, we must look at the violence of recent rains. As explained by the organizationthe new explosive storms fall on highly eroded basins. The water carries tons of earth, stones and debris into the reservoir. Older infrastructures lack the agility to manage this mix. The technical data is alarming. According to reports from the Ministry for the Ecological Transition (MITECO) and the CEDEX (Center for Studies and Experimentation of Public Works), the Ebro River has radically changed his behavior. Before the dams, the river transported 5.16 million tons of sediment per year to the Delta. Today, trapped by concrete walls, it only allows 0.37 million tons to pass through. The rest remains trapped, reducing the useful space for water. Chronicle of an ignored obsolescence. This is not an unforeseen accident; It is the result of managing the climate of the 21st century with tools from the mid-20th century. Greenpeace insists the dams operate under “climatic pressure for which they were not designed.” In the province of León, iconic reservoirs such as Villameca (inaugurated in 1946) or Barrios de Luna (1956) were designed under stable climatic parameters that have little to do with with the current extreme variability. Experts have been warning for years: geologists from the University of Barcelona They already warned in 2018 that the uncertainty about the real amount of sediment is high, because monitoring the bottom of all the swamps is complex and expensive. When the mud becomes a threat. This accumulation of materials is not just a capacity issue; It is a physical security risk that is already showing its most dangerous side in the south. While we celebrate the rain, a silent battle is being waged in Huelva against toxic sludge. Just a few days ago, the Military Emergency Unit (UME) has had to be deployed in “anticipation” in the mining ponds of the province. There, torrential rains—which have tripled forecasts in some areas—have saturated the terrain to the limit. The risk is no longer just that the reservoir will lose site, but also the liquefaction of the sludge: that the pressure of the water converts the solid waste into an uncontrollable tide. It is the most graphic reminder that our infrastructures, whether water dams or waste ponds, are suffering stress for which they are hardly prepared. From the dredge to the forest. If the reservoirs are full of mud, logic would dictate removing it; but the economic reality makes it unviable. CEDEX technical notes cited in the context of the Greenpeace complaint show that the cost of extracting The sediment “far outweighs the cost of preventing it.” Cleaning a small reservoir of just 10 hm³ could cost between 50 and 150 million euros. If the sludge needs pretreatment before going to the landfill, the price skyrockets. For its part, the MITECO has started “pilot tests” to mobilize sediments in the Mequinenza-Ribarroja section, with a budget of 1.2 million euros, but they are surgical interventions in a systemic problem. For Greenpeace, the solution is not in concrete, but in the mountains. “The solution does not end at the dam or reservoir, it begins in its surroundings,” they say. The organization demands an urgent hydrological-forest restoration, where a healthy riverbed and a basin full of trees act as a “sponge.” The roots retain the soil and prevent the mountain from falling apart when it rains heavily and ending up at the bottom of the swamp. The risk of illusory guarantee. The EU Nature Restoration Regulation, approved in 2024, obliges Spain to present a National Plan by August 2026. It is the last opportunity to change the strategy. Julio Barea, head of water at Greenpeace, issues a final warning that should resonate beyond the current rain: “The technical obsolescence of our reservoirs will make us increasingly vulnerable to the next great water crisis.” If the bottom drains are not modernized (so that the mud can leave) and the headwaters of the rivers are not reforested (so that the mud does not reach), the “water guarantee” will be a statistical fantasy. Image | freepik Xataka | Far from Grazalema and the reservoirs, Andalusia has another serious problem: completely collapsed mining ponds

We have so much water in Spain’s reservoirs right now that it has become a problem for someone: nuclear power.

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What just a few months ago seemed like a chimera—seeing overflowing reservoirs in the middle of winter—has become an overwhelming reality after the passage of successive Atlantic fronts. But the water that has fallen on the peninsula has not only alleviated the drought; has generated such an excess of energy supply that the electrical system has had to do without its traditional “base load”: nuclear energy. The data confirms that, faced with the push of water and wind, the atom has lost its place in the market. A change of scenery. According to data from the Peninsular Hydrological Bulletinthe water reserve in Spain has skyrocketed to 77.3% of its total capacity, storing 43,341 hm³ of water. This represents an increase of 10.1% in a single week, a figure that illustrates the volume of rainfall. To understand the magnitude of this data, just look back: in this same week in 2025, the reserve was at 58.13%. Even more impressive is the comparison with the average of the last 10 years, which stands at 53.6%. That is, today we have 13,000 cubic hectometers more water than the historical average for the decade. The situation is such that the focus has shifted from scarcity to security. In Andalusia, where red notices have been activated, reservoirs are functioning as the last line of defense. The system has been doing “flood lamination” work (water retention to avoid floods), especially in the Guadalquivir and Genil basin, where dams such as Iznájar or El Tranco are crucial to contain the flow before it reaches cities like Seville. The great battery of Spain is full. The impact goes far beyond the visible. Reservoirs are not just liquid stores, they are giant batteries, and right now they are more charged than ever. As detailed in the Hydrological Bulletin in your energy sectionSpain currently stores 16,184 GWh of hydroelectric energy, the largest amount ever recorded at this time. If we compare this figure with the same week of the previous year (13,825 GWh), the jump is notable: today we have 117.1% of the energy we had a year ago. This massive injection of cheap electricity has saturated the seams of the Iberian market. The supply of renewable energy has been so high that interconnections have not been able to cope. According to expert Joaquín Coronado on your LinkedIn profilethe combination of rain and high wind production in Portugal caused the saturation of the interconnection between both countries. With electricity unable to flow freely, the market disengaged: while in Spain prices were sinking due to the sun and water, in Portugal they skyrocketed during peak hours due to technical restrictions. The physical network is suffering to manage such an avalanche of green electrons. The nuclear “no home”. The direct consequence of this renewable surplus is that nuclear energy is no longer competitive in this scenario. The thesis is clear: there is plenty of installed power when the weather is favorable. According to market datathe pressure from renewables has expelled 1.5 GW of nuclear power. On the one hand, Almaraz unit II had to reduce load. On the other hand, the Trillo Nuclear Power Plant was completely disconnected from the grid on Sunday, February 8. The confirmation comes from the headquarters itself. In his informative noteTrillo managers acknowledge that the plant stopped on a scheduled basis because “it was not compatible with the electricity market nor was it required by the System Operator.” Although they assure that the plant is technically perfect, they point to an economic reason: with prices sunk by storms and “high taxation”, operating the nuclear plant costs them. The underlying debate: why keep what is left over? This episode of “nuclear blackout” comes in the middle of the debate over the extension of the Almaraz plant, whose owners are requesting to extend its useful life beyond 2027. A new report from Greenpeaceprepared by the Rey Juan Carlos University and the UPC, warns that artificially keeping nuclear operational is a stopper for the ecological transition. What happened this week in Trillo reinforces his conclusions: Technical feasibility: The study ensures that in the period 2028-2029, Almaraz’s energy could be replaced by 96.4% by renewables. Economic cost: According to The Jumpextending Almaraz would cost consumers an additional 3,831 million euros and would stop green investments worth 26,129 million. Emissions: The report indicates that the extension would generate millions of tons of extra CO2 by discouraging the installation of new clean power. The market ruling. This episode is not a meteorological anecdote, it is confirmation of a change in structural cycle. The February storm has functioned as a stress test for the electrical system and the result is clear: in a marginalist market, water and wind physically displace nuclear power. The data supports that this is already a trend, not an exception. According to closing figures for 2025 published by Five Daysin Iberdrola’s generation mix in Spain, hydroelectric energy (33.3%) already surpassed nuclear energy (33.2%) in total production last year. What happened this week in Trillo is the real-time demonstration of that statistic. With Spain’s “battery” charged to 77% and the wind turbines spinning, the rigidity of the nuclear park becomes an economic barrier. The market’s conclusion is, today, unappealable: we have so much water that nuclear power is no longer essential. Image | freepik and freepik Xataka | When Spain embraced wind energy, it did not have a problem: it would be too windy.

Spain wants more pork and more safe water in its reservoirs. And he is discovering that both things at the same time are not possible.

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Hidden in the Official Gazette of Castilla y León on Monday, there was something that they did not suspect would be controversial: the authorization to install more than 3,500 heads of pigs on the outskirts of San Cebrián de Castro, province of Zamora. Why would it be controversial? As recognized in the Diario de Zamorais the umpteenth authorization of this type in recent years and, unlike others, this macro farm is not close to any urban center. The only small problem is that, well, it is 100 meters from the Ricobayo reservoir, right where the Esla flows into the Duero. And is that a problem? The idea is to install a pig farm “with capacity for 3,100 sows with piglets until weaning (from 0 to 6 kilos in weight), with 620 replacement sows and six boars.” Just over 132,000 square meters, more than a dozen warehouses, a manure dump with a capacity for 1,215 cubic meters and two enormous slurry ponds with a capacity for 14,000 cubic meters. The project insists that “there will be no discharge into the Public Hydraulic Domain”; but, of course, the doubts are more than reasonable. In 2023, 161 Zamora municipalities They were left without drinking water due to contamination of its reservoirs. Because there is also the issue of water consumption. According to the data, an annual water consumption is estimated at 24,479 cubic meters. It’s a lot of water, but it’s not a surprise either: agriculture and livestock consume almost 90% of the Duero basin. And Ricobayo is a critical reservoir And not only for the Northern Plateau. Because what is happening in the Esla River is something much more important than it seems. Spain It is the absolute leader in European porkbut (or “because”) the legal framework is too fragmented and has huge regulatory gaps. That is to say, the basic management of intensive farms has been broken for years. The sum of an unambitious basic state standard, hydrological plans, municipal plans and environmental authorizations leaves room for dozens of towns throughout the country to spend years denouncing the enormous ecological and health consequences of this type of installations. All of this comes at a difficult time. Because the macro farm industry is about to reach its key moment: it is not only that the administration is following The closest issue is that the prosecution is taking cards in the matter. That is to say, in the near future, Spain is going to have to clarify what it wants to be at an agricultural level and at what cost. But you can’t do it with your back to the externalities it produces. The competitiveness of Spanish pork is based on vertical integration, efficiency and scale; and that pushes farms to have greater capacity and associated plants (feed, slurry treatment, biogas, etc.). That is, it puts completely new pressure on parts of the system that are not prepared to withstand it. Water is one of those problems. The Spanish water reserve is at 51.4% of its capacity and we have just emerged from one of the largest droughts in recent decades: how is it possible that a strategic resource like water enjoys these management problems (and this lack of protection)? That question is indeed more complex than it seems. Image | Bob | Raiden32 In Xataka | The Atlas of Toxic Spain: this is the geography of pollution in our country

Spain still has dozens of reservoirs that cannot be used because literally no one has laid pipes

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It was inaugurated in 2015, cost 57 million euros and has a capacity for 30 hm3 of water, but the Siles dam in Jaén hasn’t been used for a decade because no one has made the necessary pipelines to irrigate the Sierra del Segura. It is not an isolated case. An example. The Rules dam was inaugurated a little earlier: in 2004. Today, while the province of Granada is at 29% of its capacity, the Vélez de Benaudalla reservoir is close to 70%. The secret is the same: going 20 years without pipes that allow us to use water. These flagrant cases, but there are many more: Alcolea in Huelva, Mularroya in Zaragoza, Castrovido in Burgos… Is there anything more Spanish than making reservoirs and taking years—or decades—to build the pipelines that make them useful? The house on the roof. In a country like Spain, each useless cubic hectometer is not only de facto lost water, it is also a tremendous ecological damage inflicted on river channels for no reason. And, if that were not enough, it is economic nonsense. It makes no sense to mobilize all the resources necessary to launch a reservoir and then leave it forgotten. Above all, because (whether we like it or not) we live in an agricultural giant that needs water security that we cannot guarantee. The opportunity cost of delaying the pipelines necessary to launch these reservoirs impacts the economic and employment development of entire regions. A Spanish problem? To tell the truth, we cannot say that it is a purely Spanish problem either. Portugal, France or Italy have had similar problems. What happens in Spain is that there is an enormous fragmentation of powers that means that, when any problem appears, everything comes to a standstill. In our case, the central State designs and finances the main dams and key sections. However, it is the autonomous communities, the hydrographic confederations or the municipalities that they must run the secondary networks. And in determining what is the main or secondary tranche (and who should pay the bill) most problems arise. But not the only ones. And it is that, as the processes become eternallicenses expire, works are not awarded, litigation drags on, environmental requirements become stricter and solving the problem becomes impossible. In the end, the dams are what is striking (what is politically profitable). The “last mile” (that whole set of pumping stations, pipelines and treatment plants) is much less striking, as crucial as it is. When problems become entrenched, there are no good solutions and administrations prefer to put the issue aside rather than make decisions. The country of a thousand preys. Because yes, it is true: Spain has many damsbut dozens of them remain vats of water without any use. And as much as the causes are clear, it is still striking that not even water crises like those of recent years manage to solve this. Image | Red Zeppelin In Xataka | “In the next ten years, Spain and Latin America are going to suffer (a lot) with water,” Robert Glennon (University of Arizona)

The rains in the Mediterranean have arrived at a very delicate time for the reservoirs of the region

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The Mediterranean basin is living a new episode of heavy rains. The extreme of the episode led yesterday to the State Meteorology Agency (AEMET) to Issue several red notices For extreme risk, while numerous yellow and oranges notices remain in force today. Despite the obvious risk that this is, there is the circumstance that rainfall arrives at a delicate time for one of the hydrographic basins of the region. The arrival of the rains. The Mediterranean basin rains They monopolize the looks of meteorologists. Aemet today maintains several notices associated with storms and rainfall in much of the eastern coast, notices that also cover interior provinces. Notices that, during the morning they will still remain in the Balearic Islands. A delicate moment in the safe. After several years of drought, almost a year of high rainfall between autumn of 2024 and Spring of 2025 served to allow most of the country’s hydrographic basins to recover water. Many even saw unprecedented filling levels in years. This It wasn’t exactly The case of the Segura Basin. The state of The reservoirs of this basin From southeast peninsular improved with respect to 2024, but did not reach the filling level of 2023 or its average of the last 10 years. Such is the situation, that a few days ago, the Segura Hydrographic Confederation He pointed out that the scarcity index index had crossed the threshold of the pre -alder and was approaching the border of the alert situation. A dry August. Except in some specific areas, August has been A dry month on the peninsula (Not so much in the island communities), even by this point of the year. Precipitation in peninsular Spain were around 34% lower than those that could be expected for a month of August, and that has been noted in the water reserve. The Spanish reservoirs went from being, on average, 67% of its capacity At the end of July to be at 59.3% At the beginning of September. Of course, summer is a time when Reserve descent Water is expected, but weather has not helped stop this trend. In the case of the Safe Basin, the Last data availablethose of last week, indicate that the reservoirs of this environment are found at 22.5% of its capacity, making it the dry basin in the country. It is also at a distance from the next, that of Guadalete-Barbate, which was last week to 44.5% of its capacity. We will have to wait. One of the areas where orange notices have been issued for important risk is precisely that of the Vega del Segura, in Murcia, where they are expected 30 mm accumulated in an hour. Other areas of this basin have also seen yellow or orange warnings are activated during yesterday and today. In Xataka | A Norway reservoir began to release millions of liters of water without anyone ordering it. Months later, we already know why Image | SUPERCHILUM, CC by-SA 4.0 / ECMWF

Large basins already have their reservoirs less than 80% of their capacity

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Summer is affecting Spanish reservoirs. After almost a year of Hydrolyogical recoverysummer goes to the amount of reservoir water, which has been especially reduced in the downtown and north basins. Two months. Since reaching its annual peak before the start of summer, the amount of water retained in Spanish swamps has descended significantly. If at the end of May the Spanish Water Reserve It was 77.5% of its capacity, nine weeks later It is 68.4%. At a light pace. The speed at which the swamps are emptying this summer It’s somewhat faster that the average of recent years and considerably faster than in the last two summers. If in their peak the Spanish reservoirs accumulated 43,407 cubic hectometers (HM³), now they have 38,311 hm³, a decrease of 11.74% compared to this maximum (9.1% less compared to the total capacity of the system). This fall is somewhat greater than usual in this period. If we took the same dates last year, the fall was 8.88%, while the average of the last 5 years was 11.18% for the same dates. 10.98% if we consider the last 10 years. Different basins, different falls. The basin most affected by this fall is that of the coast of Galicia. The reservoirs of this basin have passed to save 548 to 417 hm³or what is the same, 23.91% less water. Among the big basins, the largest falls have been seen in the Duero, which went from 7,040 to 6,031 hm³ (a 14.33%drop); and of the Guadalquivir, which passed from 4,905 to 4,206 hm³ (14.25% less). Less restrictions. Part of the difference can be explained with the end of the drought that threatened our reservation last year at this point, a drought that affected all the basins of the Peninsula. The lack of water led the administrations to introduce Measures to limit consumption water. Some measures that, as the rains arrived, were being lifted by the different administrations that introduced them. Now, After relaxing the measureswater consumption has been able to increase and, with it, the speed at which our swamps empties. A June of the most anomalous. Summer is always a time of water stress: rainfall is usually minor and water consumption is greater. This year this is especially true, especially during the month of June. The summer of 2025 began strongly. June was not only an extremely warm month (the warmest since we have records), it was also a drier month than is usually common on dates. Precipitation was about 68% of the usual in peninsular Spain. Heat implies greater Evaporation of reservoirs water. A study Posted in 2000 It estimated at 1,400 hm³ the evaporated water in reservoirs and wetlands of Spain. This figure, of course, depends on factors such as temperature, but also on others such as the filling of the reservoirs (more water, more surface; already more surface, more evaporation). Heat makes more water to refresh us, also through greater energy consumption, and the lack of rains in some contexts must be supplied with water from reservoirs. In Xataka | The next great drought is a matter of time. It is the one we have to solve the problem of sediments in reservoirs Image | Pedro Luis Domínguez Ruiz

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