Scientists have reported that Western Europe experienced its hottest June on record last month, with a prolonged heatwave triggering extreme temperature spikes across France, Britain, Spain, and additional regions.
According to Copernicus, the European Union’s climate monitoring service, average June temperatures across Western Europe rose 3.05°C (5.5°F) above seasonal norms over recent decades. This marked a significant exceedance of the previous record set in 2023.
Globally, June ranked as the second-warmest month on record, with Earth’s average temperature 1.39°C (2.5°F) above pre-industrial levels. These levels reflect the cumulative warming driven by human-caused emissions of carbon dioxide and other greenhouse gases since the dawn of the industrial era.
“The climate system is accumulating heat at an unprecedented rate,” noted Samantha Burgess, a Copernicus climate scientist. “This intensifies heatwaves, elevates ocean temperatures, and amplifies threats to communities, ecosystems, and critical infrastructure across Europe and beyond.”
The Western European heatwave followed a severe May heatwave, temporarily receding before another round of extreme temperatures emerged later in the period.
Historical June records were surpassed by substantial margins in England, Spain, Germany, the Netherlands, and Switzerland. France endured its hottest month-long temperature profile—and achieved its highest nationwide daily maximum temperature across any calendar month, reaching this peak three consecutive days.
While persistent heat patterns are not inherently new, their intensity and frequency have surged due to global warming caused by fossil fuel-driven carbon emissions. This anthropogenic warming enables heatwaves to routinely breach historical temperature thresholds, including surpassing the severity of the 2003 European heatwave that claimed over 70,000 lives.
Researchers analyzing Western Europe’s June heat confirmed that human-driven climate change significantly elevated the likelihood of such extreme conditions. Scientific assessments concluded that the probability of experiencing such widespread high temperatures has increased further compared to the 2003 event.
In France, official health data revealed 1,000 excess deaths during three of the hottest days in late June. The majority—85%—of fatalities occurred among individuals aged 65 and older, though elevated mortality rates were observed across all demographic groups according to the national health agency.
Preliminary scientific estimates suggest total heat-related deaths in France may have exceeded 2,700 for the month. These figures underscore the escalating health risks posed by rising global temperatures and extreme weather events.