The UK and Switzerland have registered their hottest June days on record, while France faces mounting health emergencies and child deaths linked to extreme heat.
A severe early-summer heatwave is sweeping across Europe, shattering temperature records, disrupting public services and placing health systems under growing pressure as authorities warn that millions of people remain exposed to dangerous conditions.
The United Kingdom and Switzerland have both recorded their hottest June days on record, marking another alarming milestone in a heatwave that has pushed much of western Europe into emergency response mode. In Britain, temperatures climbed above 36°C, while Switzerland saw the mercury rise to around 38°C in Basel, an unprecedented level for the month of June.
France has been among the hardest-hit countries. Large parts of the country remain under extreme heat alerts, with officials warning residents to avoid outdoor activity, stay hydrated and check on vulnerable people. The heat has been linked to the deaths of children, including a third reported child fatality, intensifying public concern over the speed and severity of the crisis.
Hospitals and emergency services are reporting a sharp increase in heat-related incidents, including dehydration, heat exhaustion, cardiac stress and accidents involving people trying to cool off in rivers, lakes and public fountains. In Paris and other urban areas, the combination of high daytime temperatures and unusually warm nights has left residents with little chance to recover physically from the heat.
The impact has extended well beyond public health. Schools have been closed or forced to modify schedules, transport networks have faced disruption, and some cultural landmarks have reduced opening hours to protect visitors and staff. In France, concerns over overheated rivers have also raised pressure on the country’s energy system, where nuclear plants depend on river water for cooling.
Scientists say the intensity of the heatwave reflects a broader pattern of climate-driven extremes across Europe. Heatwaves are becoming more frequent, longer and more dangerous, particularly in regions where buildings, transport systems and public health infrastructure were not designed for sustained temperatures near or above 40°C.
The crisis has exposed Europe’s vulnerability to extreme heat. Many homes, schools and hospitals still lack adequate cooling systems, while elderly people, children, outdoor workers and those with existing health conditions face the greatest risks.
Authorities across the continent are now urging people to treat extreme heat as a serious public health threat rather than a seasonal inconvenience. As the heatwave continues, the immediate priority is preventing further deaths. But the longer-term challenge is becoming harder to ignore: Europe is warming quickly, and its cities, energy systems and public services must adapt to a hotter and more volatile climate.
