Western and central Europe faced a severe heatwave during the latter part of June, marking the second major heat event in two months. Multiple countries broke temperature records, with France recording its highest temperature on consecutive days and the UK, Spain, and Switzerland all exceeding June records. A rapid-response attribution study concluded that climate change was directly responsible for the extreme conditions, noting that temperatures of this magnitude would have been “virtually impossible” 50 years ago. The research found that overnight temperatures of the intensity experienced were approximately 100 times more likely in the current climate compared to 2003.
The heatwave originated from a weather phenomenon known as an “omega block,” a rare pattern that trapped intense heat over specific regions for extended periods. This pattern pulled hot air from Africa northward over Europe, creating a heat dome centered over France. Temperature records fell across the continent on multiple consecutive days. France experienced its hottest June days on record, with a national heat index reaching 30C on one date, and over 72 administrative districts placed under red alerts. The heatwave subsequently spread to other parts of western Europe, with Spain recording a June daily average of 28.2C, the UK surpassing its long-standing June record multiple times, and Switzerland breaking a June temperature record set in 1947. As the system moved eastward, central European countries including Czechia, Germany, and Poland all set temperature records.
The extreme heat resulted in significant societal disruption and health impacts across affected regions. Schools, hospitals, transport networks and utilities struggled to maintain operations, with numerous closures and cancellations reported. Public health agencies documented elevated emergency call volumes and excess deaths, with the World Health Organization reporting over 1,300 heat-related excess deaths recorded since the event began. France’s health ministry reported approximately 1,000 additional deaths beyond expected levels. Power outages affected tens of thousands of households, while emergency health services experienced substantial increases in call volumes.
Media coverage of the event varied considerably in tone and focus. While some outlets prominently featured health warnings and drew explicit connections between the heatwave and climate change, others presented lighter coverage emphasizing recreational activities and positive aspects of warm weather. Some UK newspapers drew comparisons to historical heat events from 1957 and 1976, with certain commentators suggesting contemporary responses were excessive. Scientists and media analysts expressed concern that significant portions of news coverage failed to adequately communicate the scientific links between greenhouse gas emissions and extreme weather events, or used imagery that downplayed health risks associated with the conditions.