# European energy production impacts from drought

> Live situation record from CLSTR: https://clstr.news/situations/european-energy-production-impacts-from-drought
> Updated: 2026-08-09T16:10:12.000Z. Sources: 10. Developments: 2.

Severe summer droughts and extreme heatwaves across Europe have significantly strained the regional power grid by impacting both hydroelectric and nuclear energy production. Low river levels and high water temperatures have forced several nuclear plants to shut down or curtail output, including facilities in France, Hungary, Romania, and Switzerland.

In France, EDF has adjusted production at the Golfech and Saint-Alban plants due to temperature limits on the Garonne and Rhône rivers. In Switzerland, Axpo reduced output at the Beznau plant as the Aare river reached 25 °C. Romania’s Nuclearelectrica implemented a preventive shutdown of unit 1 at the Cernavodă plant because of critically low Danube levels. Additionally, Hungary has faced challenges with its sole nuclear plant, and Slovenia has reduced production due to high temperatures and low flow in the Sava river.

In Romania, the crisis previously led to the temporary closure of Dacia and Ford factories to maintain grid stability, and emergency measures such as using trucks to divert cooling water were employed. To combat these climate-driven vulnerabilities, the French utility EDF announced a 9 billion euro investment plan over 15 years to adapt its nuclear units. Meanwhile, energy companies like Emerald Horizon have proposed new technologies, such as the SMRX system, to address the “fundamental design flaw” where both hydro and nuclear power rely on the same water resources and fail simultaneously during droughts.

## Claims

- EDF plans to invest 9 billion euros over 15 years to adapt its nuclear units to climate change. (corroborated by 2 sources)
- EDF stopped reactor 2 at the Golfech nuclear plant due to water temperature limits in the Garonne river. (single source)
- Nuclearelectrica performed a preventive shutdown of unit 1 at the Cernavodă plant due to low Danube river levels. (single source)
- Axpo reduced power at the Beznau plant in Switzerland to 50% because the Aare river reached 25 °C. (single source)
- Copernicus reported critical drought conditions across various European areas in July 2026. (single source)

## Timeline

### 2026-08-09: Climate change impacts European nuclear energy production

Climate-driven heatwaves and droughts are forcing nuclear power plants across France, Switzerland, Romania, and Hungary to reduce output or shut down due to insufficient or too-warm river water for cooling.

4 sources. https://clstr.news/cluster/climate-change-impacts-european-nuclear-energy-production

### 2026-08-04: Emerald Horizon offers fix as Europe's power grid strains under drought

Europe's power grid is under strain from a summer drought that shut nuclear plants in Hungary, Romania and Switzerland and forced Romanian auto factories to halt production. Emerald Horizon proposes a new SMRX‑

6 sources. https://clstr.news/cluster/emerald-horizon-offers-fix-as-europes-power-grid-strains-under-drought

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Cite as: European energy production impacts from drought. CLSTR, https://clstr.news/situations/european-energy-production-impacts-from-drought