Wildfires were raging in Spain and France on Tuesday after a dayslong heat wave parched landscapes in the region and turned woodlands into tinderboxes.

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

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).

Paris extended a red alert for high temperatures on Tuesday, with the top of the Eiffel Tower shut, polluting traffic banned and speed restrictions in place as a searing heat wave grips Europe.

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.

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.

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,

Rome and Paris zoos served up frozen treats to its animals on Wednesday as the European capitals were caught in a severe heat wave.