A report from the European Union’s Copernicus climate monitoring service determined that western Europe endured its hottest summer on record, with surface air temperatures from June through August running 2.5 degrees Celsius above the recent decadal average. More than half the continent experienced “very strong” heat stress, with temperatures exceeding 38 degrees Celsius. The remainder of Europe also suffered elevated temperatures, making the overall season the continent’s third hottest on record.
The intense heat contributed to a surge in heat-related deaths across Europe, while also disrupting agriculture, energy infrastructure, and ecosystems. At least 60 percent of western Europe experienced temperatures above 30 degrees Celsius on 17 days during the summer months. An abnormally early heatwave emerged in late May and persisted through September. The recurring extreme heat events coincided with drought conditions, low river water levels, and widespread wildfires that burned approximately 680,000 hectares by the end of September.
European sea surface temperatures also set records during this period, while rivers experienced their lowest summer flows in more than 30 years. The combination of heat, drought, and dry conditions created severe fire weather, which the European Forest Fire Information System characterized as the worst on record. Wildfire smoke released 30 percent more fine particulate matter into the atmosphere than the two-decade average, creating significant public health concerns.
Scientists attributed the extreme conditions primarily to fossil fuel emissions warming the atmosphere, though they noted that a strengthening El Niño pattern was contributing to elevated global temperatures. Researchers and public health officials have called for governments to reduce fossil fuel consumption and implement urban adaptation measures including increased tree canopy coverage, building shade structures, and improved air conditioning access in hospitals, schools, and care facilities.
Experts characterized the extreme weather patterns as evidence of unprecedented changes in European climate conditions, with multiple temperature and weather records broken at local, regional, and continental scales.
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