A brutal heatwave forced France to cut 6.4 GW of nuclear power Monday, curbing output at eight reactors as river cooling water ran too hot.

France is cutting nuclear output at up to five plants as a brutal heat wave strains rivers, grids and energy security across Europe.

PARIS: France’s main energy provider on Sunday said three nuclear reactors had been temporarily shut down and eight others were operating at reduced power due to the heatwave…