Western Europe swelters through hottest June on record, heatwave linked to thousands of deaths
Western Europe experienced its hottest June on record, with average temperatures more than 3°C above normal, the EU's Copernicus Climate Change Service reported. The heatwave, linked to thousands of deaths, is part of a pattern of intensifying climate extremes.
Temperature records
Western Europe's average temperature reached 20.74°C in June, more than 3°C above the 1991-2020 norm, Copernicus reported. This broke the previous regional record set in June 2025. Globally, June 2026 was the second warmest on record, with temperatures 1.39°C above pre-industrial levels.
Heat dome and human toll
A persistent high-pressure system, described as a "heat dome", trapped hot air over the continent in the second half of June. More than two-thirds of Europeans, 410 million people, endured temperatures above 35°C. Thousands of deaths were linked to the heatwave, mostly in France, Spain and Belgium. High humidity prevented nighttime cooling, with a series of tropical nights.
It was extremely humid, which then meant we people didn't get relief at night. So we had a number of tropical nights in a row.
Warming seas and drought
Sea surface temperatures outside polar regions hit 20.86°C, the highest June value on record. The warm Mediterranean and Atlantic coastal waters reduced the usual cooling sea breezes. Dry conditions raised drought risks in Eastern Europe and fueled wildfires in the Iberian Peninsula and southern France.
When the sea is warm, we get less alleviation at nighttime because there's no coolness coming from the ocean. There's no sea breeze.
Ongoing heatwave
A new heatwave is affecting Europe this week. In France, 72 departments are under orange alert, with temperatures reaching 40-41°C near the Languedoc-Roussillon coast and 37°C expected in Paris on Friday. Germany recorded its highest temperature ever on 27 June, with 41.8°C in Möckern-Drewitz, Saxony-Anhalt.
- Unusually early spring heatwave hits Europe.
- Heat dome forms, breaking temperature records across Western Europe.
- Germany records 41.8°C in Möckern-Drewitz, a new national record.
- New heatwave ongoing; France issues orange alerts for 72 departments, Paris expects 37°C.
Climate reality
Europe is the world's fastest-warming continent, and changes in atmospheric circulation are making heatwaves more frequent and intense. Samantha Burgess, strategic climate lead at ECMWF, said the shift from abstract future problem to disruptive daily reality is now clear.
We're at a transition point where climate change is shifting from being an abstract statistical future problem that you read about in reports, to a concrete present and disruptive feature of daily life.
