Météo-France placed 72 departments under red vigilance alert on Thursday, June 24, 2026, due to an extreme and durable heatwave [1, 2].
This event represents a critical public health risk because of the scale of the affected population and the intensity of the temperature spike. With tens of millions of people exposed to dangerous heat, the nation's infrastructure and healthcare systems are under severe pressure.
The meteorological agency said the episode had an exceptional intensity [3]. Temperatures reached as high as 43°C in some regions [3]. On average, readings were approximately 12°C above seasonal normals [4].
The red alert affected 72 departments [1], which placed roughly 51 million people under the highest level of vigilance [1]. This widespread alert indicates a severe threat to life and health across a vast portion of the country.
The extreme weather has already strained emergency services and medical facilities. The prefect said, "Les hôpitaux sont saturés" [2].
Local authorities are urging citizens to follow safety protocols to prevent heatstroke and dehydration. The duration of this heatwave has compounded the stress on urban areas, particularly in cities where the heat island effect intensifies the temperature, and rural agricultural zones.
“72 departments placed under red vigilance”
The scale of this heatwave, affecting over 50 million people with temperatures 12°C above normal, suggests a systemic vulnerability in France's urban and healthcare infrastructure. When hospitals reach saturation during a weather event, it indicates that the surge in heat-related emergencies exceeds the capacity of the national health system to respond, potentially increasing mortality rates among elderly and vulnerable populations.
