Europe's Hydropower Plummets to Record Lows Amid Severe Droughts
Top line
Severe European droughts have driven hydropower generation to record lows, forcing increased reliance on fossil fuels and highlighting the need for renewable energy hybridisation.
Summary
Europe's hydropower generation has plummeted to record lows due to severe summer droughts and extreme heatwaves affecting the Alpine region and the wider continent. With water inflows roughly 50 percent below average in countries like Austria and Switzerland, and low river levels forcing nuclear and hydro curtailments, the EU has been forced to increase its reliance on fossil gas. To mitigate these energy vulnerabilities, experts advocate for a diversified renewable energy mix and the hybridisation of wind, solar, and storage technologies to optimise existing grid infrastructure.
Highlights
- Europe is experiencing severe summer droughts and heatwaves driven by human-induced climate change, leading to dwindling water supplies and heightened wildfire risks across multiple countries.
- Water inflows for hydroelectric power plants in the Alpine region are near all-time lows, with July inflows in Austria and Switzerland dropping nearly 50 percent below average.
- Hydropower generation in July reached only 51 percent of usual levels in Austria and 48 percent in Switzerland compared to the past 15 years, while Germany and France also saw notable declines.
- Low water levels on the Danube River forced Hungary to shut down parts of the Paks nuclear power plant for the first time in almost half a century.
- Hydropower remains the EU's second-largest renewable electricity source, accounting for 28 percent of electricity demand in the first quarter of 2026.
- Declining hydropower production has increased Europe's reliance on fossil fuels, leading to an eight percent rise in EU gas-powered electricity generation last year.
- In contrast, solar energy generation surged by over 20 percent in 2025, reaching record highs and underscoring the importance of a diversified renewable energy mix.
- Experts recommend 'hybridisation'—combining wind, solar, and storage behind a single grid connection—to integrate new renewables efficiently without requiring additional grid capacity.
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