June and July 2025 marked the hottest two months on record in Western Europe, driven by persistent high-pressure systems that trapped heat and intensified drought conditions. According to the Copernicus Climate Change Service (C3S), June 2025 was the fifth-warmest June on record for the entire continent and the warmest for Western Europe specifically, with an average temperature of 20.49°C, 2.81°C above the 1991–2020 average.

Record Heat and Drought

The extreme heat exacerbated widespread drought across France and Spain; Soils, deprived of moisture, lost their natural cooling capacity, allowing heat to accumulate more easily; the European Union’s climate monitor reported that the Seine, Rhine, and Danube rivers experienced exceptionally low water levels, which disrupted water supplies and irrigation. In Hungary and Slovenia, nuclear power plants had to operate at reduced capacity due to the low river flows.

Wildfires and Environmental Impact

Record drought conditions fueled devastating wildfires across the region; In southwestern France’s Gironde department, a megafire burned nearly 42,000 hectares (103,785 acres) in late July, forcing the evacuation of over 220,000 people. Around the same time, Spain experienced its largest wildfire in recent history, which scorched 44,000 hectares (108,725 acres) in Avila province near Madrid.

The C3S also noted that large wildfires can send smoke high into the atmosphere, affecting air quality thousands of kilometers away. In addition, sea surface temperatures reached record highs in July, with an average of 20.96°C (69.7°F), slightly above the previous record of 20.89°C (69.6°F) in 2023.

Global Context and Public Health

Heatwaves are becoming more frequent and severe worldwide. In Japan, where Shizuoka recorded 40°C (104°F) in July, far above the 35°C threshold deemed “extremely hot” by local authorities, residents described the restrictive humidity as particularly difficult to endure. Meanwhile, the European Union’s climate monitor reported that the Earth experienced its warmest day in recorded history in July 2025.

In France, Météo France reported that Tuesday, 23 June 2026 was the hottest day since records began in 1947; In Spain, the State Meteorological Agency (AEMET) issued a red alert for above-average temperatures in northern regions such as Gipuzkoa, Bizkaia, and Cantabria. Data from the Copernicus Sentinel-3 satellites showed land surface temperatures exceeding 50°C in parts of France and northern Spain, highlighting the severity of the heatwave.

These extreme weather events expose the growing impact of climate change on public health, infrastructure, and ecosystems, while Authorities and scientists continue to monitor the long-term implications of such record-breaking heat and drought conditions in Western Europe.