# Extreme heat, storms, and water infrastructure crisis

> Live situation record from CLSTR: https://clstr.news/situations/balkans-drought-water-restrictions
> Updated: 2026-09-20T05:11:25.000Z. Sources: 162. Developments: 30.

The drought and extreme weather crisis across Central Europe and the Balkans has intensified, characterized by heatwaves, severe thunderstorms, and prolonged water scarcity. In Slovakia, experts warn that the drought has transitioned into a “new climate regime,” with extreme episodes more than doubling due to increased evaporation.

Infrastructure failures are exacerbating the crisis. In the Czech Republic, approximately one in seven liters of drinking water is lost before reaching consumers, with physical losses totaling 83.7 million cubic meters in 2025. The renewal rate is extremely slow, with only 0.41% of the network replaced annually, suggesting a full renewal would take over 240 years. In Slovakia, the Supreme Audit Office reports that modernization debt exceeds 10 billion euros, with infrastructure in some areas up to 70% worn out. While Slovakia has sufficient water capacity via the Žitný ostrov reservoir, Alena Trančíková of Bratislavská vodárenská spoločnosť warns that the nation lacks the infrastructure to distribute water to drier regions like eastern Slovakia.

Environmental protection also remains a concern. Trančíková noted that while groundwater protection legislation is high-quality, enforcement is problematic, specifically citing agricultural runoff on Žitný ostrov as a major pollution source. 

Extreme heatwaves have also triggered a significant health crisis across Europe, resulting in more than 35,000 excess deaths. Agricultural impacts remain severe, with significant yield losses reported in Slovenia, Bosnia and Herzegovina, and Croatia.

## Claims

- An emergency water‑reduction regime of two days on, two days off has been imposed in the Banja Luka area. (disputed)
- Serbian government reports no water‑use restrictions but urges rational consumption amid heatwave. (disputed)
- Prolonged heat wave and lack of rainfall have caused river water levels to drop to historic lows across the Balkans and Central Europe. (corroborated by 9 sources)
- The Drava at Osijek fell to a record low of –192 cm. (corroborated by 4 sources)
- Authorities in the region have issued appeals urging citizens to conserve water and avoid non‑essential uses such as garden irrigation and pool filling. (corroborated by 4 sources)
- The Agency for Road Safety (AVP) is distributing water and safety leaflets at selected rest areas as part of a “Safe in Summer” campaign. (corroborated by 4 sources)
- The Dars traffic‑information centre warned of very high traffic density this weekend. (corroborated by 4 sources)
- The potato harvest in Slovenia has seen a loss of between 30 and 90 percent due to severe droughts in Europe. (corroborated by 4 sources)
- Slovenia produced approximately one-third of its total potato consumption in 2025. (corroborated by 4 sources)
- Potato production rates are declining due to high fertilizer prices, pesticide restrictions, and low purchase prices. (corroborated by 4 sources)
- Farmer Janez Jambrosic lost 50 percent of his potato harvest this year. (corroborated by 4 sources)

## Timeline

### 2026-09-20: Slovakia faces water distribution and protection challenges

Slovakia has sufficient water reserves via the Žitný ostrov, but lacks the infrastructure to distribute it and faces challenges with legislative enforcement and agricultural pollution.

2 sources. https://clstr.news/cluster/slovakia-faces-water-distribution-and-protection-challenges

### 2026-09-17: Water infrastructure crisis in Czech Republic and Slovakia

Aging water infrastructure in the Czech Republic and Slovakia is causing massive drinking water losses and mounting investment debts, with renewal efforts struggling to keep pace with deterioration.

2 sources. https://clstr.news/cluster/water-infrastructure-crisis-in-czech-republic-and-slovakia

### 2026-09-17: Slovenia potato yields drop significantly due to drought

Severe droughts in Europe have caused Slovenia’s potato harvest to drop by an estimated 30 to 90 percent, leaving the country producing only a third of its required consumption.

4 sources. https://clstr.news/cluster/slovenia-potato-yields-drop-significantly-due-to-drought

### 2026-09-12: Slovakia faces water infrastructure losses and drought risks

Slovakia faces a dual water crisis: nearly 30 percent of drinking water is lost due to aging infrastructure, while severe drought threatens crop yields and could drive up food prices.

3 sources. https://clstr.news/cluster/slovakia-faces-water-infrastructure-losses-and-drought-risks

### 2026-09-11: Europe faces deadly heatwave crisis with 35,000 excess deaths

Extreme heatwaves in Europe have caused over 35,000 excess deaths, with the highest mortality rates in Germany, France, Spain, and Italy as temperatures hit record highs.

9 sources. https://clstr.news/cluster/drought-causes-water-shortages-and-ecological-damage-in-peter-and-medvednica

### 2026-09-09: Drought and pests threaten agricultural yields in Croatia and Neretva Valley

Drought and pests are threatening agricultural yields in Croatia and the Neretva Valley, specifically impacting mandarin harvests and sugar beet production.

6 sources. https://clstr.news/cluster/drought-and-pests-threaten-agricultural-yields-in-croatia-and-neretva-valley

### 2026-09-08: Agricultural authorities in Slovenia and Croatia call for drought damage reports

Authorities in Velenje, Slovenia, and Ilok, Croatia, are calling on farmers to report agricultural damage caused by the 2026 drought to assist in official damage assessments.

2 sources. https://clstr.news/cluster/agricultural-authorities-in-slovenia-and-croatia-call-for-drought-damage-reports

### 2026-09-04: Brčko District farmers face catastrophic soybean yields due to drought

Severe drought and high temperatures in the Brčko District have caused catastrophic soybean yields and threaten to halve corn production, leaving farmers struggling to cover costs.

7 sources. https://clstr.news/cluster/brko-district-farmers-face-catastrophic-soybean-yields-due-to-drought

### 2026-09-02: Slovenian vineyards face significant crop losses due to drought

Severe drought in Slovenia is causing a 30-40% drop in grape yields and forcing much earlier harvests, impacting both the quantity and quality of wine production.

3 sources. https://clstr.news/cluster/slovenian-vineyards-face-significant-crop-losses-due-to-drought

### 2026-08-28: Slovenian farmers face drought and weather-related economic hardships

Slovenian farmers are struggling with the combined effects of prolonged drought, hailstorms, and low commodity prices, prompting official damage assessments and government financial aid measures.

4 sources. https://clstr.news/cluster/slovenian-farmers-face-drought-and-weather-related-economic-hardships

### 2026-08-27: River ecosystems face drought threats in Montenegro and Slovenia

Drought conditions are prompting ecological interventions in Montenegro and Slovenia, including water restriction proposals for the Breznica River and large-scale wetland restoration along the Mura and Drava.

2 sources. https://clstr.news/cluster/river-ecosystems-face-drought-threats-in-montenegro-and-slovenia

### 2026-08-26: Slovenia drought impacts grape yields and salt production

Drought in Slovenia is causing up to a 40% drop in grape yields in Dolenjska and Bela Krajina, while heat accelerates salt production targets in Sečovlje.

4 sources. https://clstr.news/cluster/slovenia-drought-impacts-grape-yields-and-salt-production

### 2026-08-24: Slovenian farmers face livestock sales amid severe drought

Drought in Slovenia is causing significant crop failures and fodder shortages, forcing some farmers to sell livestock due to reduced yields in corn, barley, and grassland.

2 sources. https://clstr.news/cluster/slovenian-farmers-face-livestock-sales-amid-severe-drought

### 2026-08-21: Slovenia faces mountain water shortages and tourism pressure

Slovenian mountain huts face critical water shortages due to drought, while regions like Lepena struggle with extreme tourism pressure and traffic chaos.

3 sources. https://clstr.news/cluster/slovenia-faces-mountain-water-shortages-and-tourism-pressure

### 2026-08-21: Slovenia drought persists despite heavy overnight rainfall

Recent heavy rainfall in Slovenia has moistened surface soil but failed to significantly alleviate widespread drought and critical water deficits affecting agriculture and various regions.

3 sources. https://clstr.news/cluster/slovenia-drought-persists-despite-heavy-overnight-rainfall

### 2026-08-18: Slovakia faces extreme drought as climate regime shifts

Slovakia is entering a new climate regime characterized by extreme drought. Experts warn that increased atmospheric evaporation, rather than just low rainfall, is rapidly drying the landscape.

51 sources. https://clstr.news/cluster/slovakia-faces-extreme-drought-driven-by-rising-evaporation

### 2026-08-17: Slovenia drought causes severe agricultural and environmental damage

Severe drought in Slovenia is causing massive crop failures in corn and grapes, forcing government aid of 8.45 million euros and impacting river ecosystems and mushroom growth.

16 sources. https://clstr.news/cluster/slovenia-faces-agricultural-crisis-due-to-severe-drought

### 2026-08-13: Isonzo River drought prompts urgent request for water management reform

Authorities in Gorizia have requested urgent intervention to address the Isonzo River's water crisis, calling for new regulations on water releases from Slovenia's Solkan hydroelectric plant.

2 sources. https://clstr.news/cluster/isonzo-river-drought-prompts-urgent-request-for-water-management-reform

### 2026-08-13: Slovenian agriculture faces severe damage from drought

Severe drought and extreme heat in Slovenia are causing massive agricultural damage, with some crop yields dropping by over 50 percent, threatening the livelihoods of local producers.

3 sources. https://clstr.news/cluster/slovenian-agriculture-faces-severe-damage-from-drought

### 2026-08-11: Agriculture in Croatia and Serbia faces severe drought and heat

Extreme heat and drought in Croatia and Serbia are threatening corn and sunflower yields, forcing farmers to adapt through new technologies and drought-resistant crop varieties.

9 sources. https://clstr.news/cluster/drought-threatens-corn-yields-in-croatia-and-serbia

### 2026-08-11: Drought causes record-low river levels across Europe

Drought and record-low water levels in the Danube and other European rivers are causing water restrictions in Serbia and forcing Slovenian fishermen to use compressors to save fish in drying ponds.

4 sources. https://clstr.news/cluster/drought-causes-record-low-river-levels-across-europe

### 2026-08-10: Slovenia drought strains water supplies for residents and bees

Drought in Slovenia is straining water supplies, forcing firefighters to deliver drinking water to residents and prompting beekeepers to provide extra water and food to protect bee colonies.

2 sources. https://clstr.news/cluster/slovenia-drought-strains-water-supplies-for-residents-and-bees

### 2026-08-09: Slovenia faces energy and environmental strain from drought

Severe drought and heatwaves in Slovenia are impacting energy production at the Krško Nuclear Power Plant and causing widespread failure of urban greenery due to water scarcity.

4 sources. https://clstr.news/cluster/slovenia-faces-energy-and-environmental-strain-from-drought

### 2026-08-06: Slovenia sees brief cooling, ongoing drought and traffic snarls

Slovenia’s heat wave eases with rain, but drought persists, water‑use fines rise and traffic jams cause up to 1.5‑hour delays on highways.

13 sources. https://clstr.news/cluster/slovenia-faces-ongoing-severe-drought-for-next-ten-days

### 2026-08-05: Balkans Drought Drives Record Low River Levels and Water Conservation Appeals

Severe drought in the Balkans drives record low river levels—Danube –142 cm, Drava –192 cm—and prompts water‑conservation appeals across Serbia, Croatia, Bosnia and neighboring areas.

29 sources. https://clstr.news/cluster/prolonged-drought-lowers-water-levels-across-adriatic-basin

### 2026-08-03: Maribor Mayor Announces Subsidized Water Transport Amid Drought

Maribor mayor authorises subsidised tanker water for drought‑hit KS Kamnica residents, while Kanal mayor enforces a ban on non‑essential drinking‑water use amid severe water shortages.

2 sources. https://clstr.news/cluster/maribor-mayor-announces-subsidized-water-transport-amid-drought

### 2026-08-01: Debar, Macedonia imposes water restrictions amid shortage

Debar’s public utility restricts water use to a few hours daily as a drinking‑water shortage hits several neighborhoods, urging residents to limit non‑essential consumption.

3 sources. https://clstr.news/cluster/debar-macedonia-imposes-water-restrictions-amid-shortage

### 2026-07-31: Serbia's Gornji Milanovac Enforces Water‑Saving Restrictions Amid Drought

Gornji Milanovac municipality in Serbia has banned irrigation, pool filling, well use and other water‑intensive activities due to drought‑related low levels in the Rzav water system, with penalties for violati​

3 sources. https://clstr.news/cluster/serbias-gornji-milanovac-enforces-watersaving-restrictions-amid-drought

### 2026-07-30: Balkans Face Multiple Water Crises Amid Drought and Infrastructure Failures

Drought lowers Slovenia's Mura and Drava rivers, cutting hydro power; Montenegro's Orahovac water remains non‑drinkable; Bosnia's Republika Srpska loses 46% of treated water, prompting emergency cuts.

7 sources. https://clstr.news/cluster/balkans-face-multiple-water-crises-amid-drought-and-infrastructure-failures

### 2026-07-29: Slovenian authorities urge water conservation amid drought

Slovenian water utilities and the national Water Directorate urged residents to curb non‑essential water use amid drought and warned of illegal stream pumping that requires permits, citing fines for violations.

3 sources. https://clstr.news/cluster/slovenian-authorities-urge-water-conservation-amid-drought

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Cite as: Extreme heat, storms, and water infrastructure crisis. CLSTR, https://clstr.news/situations/balkans-drought-water-restrictions