A marine heat wave in the Mediterranean is combining with a powerful heat dome to cause Europe to swelter under a brutal early summer heat wave.

Some parts of Western Europe were starting to cool off as the extreme heat that has gripped the continent moved east.

Europe’s heat wave is set to peak over the coming days, with a blast of Saharan air triggering red alerts from France to the Swiss Alps.

A record-breaking heat wave in Europe has forced the shutdown of at least three nuclear reactors due to rising river temperatures used for cooling. One reactor at France’s Golfech Nuclear Power Plant was shut down after forecasts showed the Garonne River could exceed 28°C (82°F).

Europe is currently experiencing its first major heatwave of the summer, with cities including Paris, Rome, The Hague, and Barcelona facing temperatures well above the seasonal average. Following a notably dry spring,