Severe Heatwave in France Brings Record Temperatures, Health Crisis, and Power Outages

France is currently grappling with a severe heatwave that has shattered temperature records and significantly strained public services. On June 25, 2026, temperatures reached a national thermal indicator of 29.99°C, marking the second hottest day since reliable records began in 1945. The previous night logged the highest overnight temperature ever recorded in France at 21.96°C. Across the country, 351 absolute temperature records and over 1,000 monthly records have been surpassed since the heatwave began on June 21, with peaks hitting 43.2°C in Beaulieu-sur-Layon and 42.7°C in Labouheyre.

This exceptional heat has led to a critical public health situation, notably in Île-de-France, where mortality rates have risen and emergency services are overwhelmed. Hospitals in Paris are saturated with increased admissions, prompting the government to activate phase 3 of the Orsan health response plan on June 25. This heightened alert also affects Nouvelle-Aquitaine and the Grand Est regions.

In Yvelines, authorities have issued a red alert for extreme heat, implementing strict measures to safeguard the population. Recommendations include regular hydration, avoiding outdoor physical activity during peak heat hours, and special attention to vulnerable groups such as the elderly and chronically ill. Prohibitions on certain public activities, restrictions on alcohol sales, and altered work schedules for construction sectors have also been enacted.

The heatwave is also impacting France's electricity infrastructure. Enedis, the national electricity distributor, reported approximately 50,000 customers currently without power due to the exceptional heat causing cables buried underground to overheat. The company has activated its rapid intervention force to mitigate outages and maintain supply.

Looking ahead, thunderstorms forecasted for the weekend, particularly on Sunday, are expected to help alleviate the intense heat, though dangerously high temperatures will persist in many areas for the time being.

This heatwave shares similarities with the devastating 2003 event but is considered slightly less severe in overall impact. However, its intensity, duration, and broad geographic scope demand continuous vigilance and response from both authorities and the public.