Jellyfish and heatwaves force a fifth of France's nuclear capacity offline

Extreme heat, droughts and a jellyfish swarm knocked about 20% of France's nuclear output offline, with 13 of 57 reactors affected (8 shut, 5 reduced). Gravelines was hit hardest as jellyfish clogged cooling pumps, and others faced cooling-water constraints; officials say there is enough leeway to avoid short-term supply problems.