Heat shuts reactors and exposes Europe’s brittle summer systems
Continues from last evening.
Europe’s heatwave moved from unpleasant to operational. The UK recorded 38.1C at Kew Gardens, its hottest day of 2026 and provisionally the fifth hottest on record, while France’s heatwave reached a 17th day and beat the duration of the 2003 episode. France kept 80 departments on orange alert and recorded 42.5C in Châteaumeillant, as fires, ozone pollution and water cuts spread across the country.
- Kew Gardens, UK38.1
- Paris, France38
- Châteaumeillant, France42.5
- Central Spain37
The Danube then turned heat into an energy problem. Romania disconnected Unit 2 at the Cernavoda nuclear plant after record-low river levels starved the station of cooling water, with Unit 1 already down since late July. Cernavoda normally supplies about a fifth of Romania’s electricity, and Hungary’s Paks plant has also cut output as the river dropped.
“We do not foresee a restart within the next 10 days.”
Governments patched the gaps with lignite, imports, voluntary cuts and industrial slowdowns, including production suspensions at Dacia and Ford in Romania. France estimated this summer’s repeated heatwaves could cost 10 billion to 15 billion euros, while EDF’s nuclear fleet hit record environmental unavailability linked to high temperatures. The old bargain, cheap power cooled by reliable rivers, looks less reliable when the rivers themselves become part of the crisis.
Reporting from: AP NEWS, Le Monde.fr, BBC, The Guardian, The New York Times, Ouest France