Western Europe records hottest June-July period ever as heatwaves, wildfires plague region

Western Europe recorded its hottest June-July period ever in 2026, with average temperatures reaching 21.62°C. Driven by climate change and a developing "Super" El Niño, the extreme heat and severe drought have mutually reinforced each other, triggering devastating wildfires that burned over 1.23 million acres and causing more than 25,000 deaths. Plunging river levels on the Danube, Rhine, and Seine have disrupted transport and forced nuclear shutdowns in Hungary and Romania, while global sea surface temperatures hit a record 20.96°C.

Western Europe record June-July temperatures

• ▪The Copernicus Climate Change Service reported that Western Europe's combined average temperature for June-July 2026 was 21.62 degrees Celsius, breaking the previous record set in 2022.
• ▪According to data compiled by Bloomberg, extreme heat has caused more than 25,000 deaths across Europe in 2026.
• ▪Globally, July 2026 was the joint second-warmest July on record, with an average surface air temperature of 16.90 degrees Celsius, tying with July 2024.

Heat dome persistence

• ▪Forecasters warned that Western Europe was bracing for its fifth heatwave of the summer starting the week of August 10, 2026, driven by an intensifying heat dome.
• ▪Samantha Burgess of the European Centre for Medium-Range Weather Forecasts stated that persistent high-pressure systems trapped heat over Western Europe, causing extreme temperatures and dry soils to mutually reinforce each other.
• ▪Italy's Health Ministry placed all 27 major cities monitored by its national heat surveillance system under its highest red alert in August 2026.

Drought conditions across Europe

• ▪The Copernicus Climate Change Service reported that soil moisture levels across Western Europe in July 2026 were significantly lower than during the severe drought of July 2022.
• ▪Very dry conditions and severe rain deficits in July 2026 affected multiple European nations, including France, Spain, Austria, Hungary, Germany, Ireland, and the United Kingdom.

Wildfire threat escalation

• ▪Laurence Rouil of the Copernicus Atmosphere Monitoring Service stated that larger wildfires in Europe have increased emissions and disrupted regional air quality by injecting smoke higher into the atmosphere.
• ▪Wildfires in Europe displaced hundreds of thousands of people and burned more than 1.23 million acres of land by August 6, 2026, primarily in Spain, France, and Italy.
• ▪The European Forest Fire Information System forecast very extreme fire conditions, the highest danger category, for parts of southern Britain, northwestern France, the Alps, and the Balkans through mid-August 2026.

River flow disruptions

• ▪Severe drought in summer 2026 caused water levels to plunge in major European rivers, including the Seine, the Rhine, and the Danube, disrupting transport, irrigation, and energy production.
• ▪Low water levels on the Danube River forced Hungary and Romania to temporarily shut down nuclear power reactors that rely on the river for cooling.

Global ocean temperature records

• ▪Copernicus director Carlo Buontempo stated that a developing, potentially unprecedented El Niño in the tropical Pacific was a primary driving force behind the record-high ocean temperatures in July 2026.
• ▪The Copernicus Climate Change Service reported that global average sea surface temperatures reached a record high of 20.96 degrees Celsius in July 2026, surpassing the previous record set in 2023.