The heatwave is taking firm hold in Paris and in Île-de-France, which have been placed under red heat alert by Météo-France for this Sunday, June 21, and Monday, June 22, 2026. We take stock of how the intense heat is evolving and when the mercury is expected to loosen its grip.
The searing heat won’t quit on Paris, the inner suburbs (Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne) and the whole Île-de-France en this June 2026. After an orange alert was issued on Thursday, June 18, Météo-France pushed the region into red alert on Sunday, June 21, the day of the solstice. We’re sweating, seeking shade, and one question is on everyone’s lips: when will it end?
The episode stretches far beyond the Île-de-France region, affecting nearly 53 million people in France. This heatwave, the first of 2026, began on Wednesday, June 17. According to Météo-France, it’s an unusually early spell, with an intensity close to that of the July 2019 and August 2003 heatwaves. It marks the 52nd heatwave recorded in France since 1947, and two-thirds of them have occurred since the start of the 21st century.
As a reminder, a heatwave is defined as temperatures staying high day and night over an extended period (at least three days), with red alert marking the highest level of the national heatwave plan. And relief isn't coming anytime soon.
According to Météo-France's bulletin issued this Sunday, June 21, the heat peak is expected on Monday, June 22, with highs climbing to around 40°C, possibly a touch higher in the Île-de-France, and between 40 and 42°C in departments currently in the red alert. Nights offer little relief, with minimums typically between 20 and 25°C, a particularly grueling pattern for the big urban areas.
Next, the intense heat settles in on a very high plateau. Temperatures are expected to range most of the time between 38 and 41°C, with local peaks above that, and to hold at least until Thursday, June 25. It is only from Friday, June 26, 2026 that a cooling trend would begin, according to the latest forecasts, a date Météo-France remains cautious to confirm. So we keep an eye on the vigilance map, refreshed daily. Even with a drop, temperatures would stay around 30°C, so a cool spell isn’t in the cards yet, for now.
Meanwhile, as the cool spell hasn’t returned, the City of Paris reminds everyone of its 1,400 cooling islands, spanning shaded parks to climate-controlled museums and libraries. The habit of staying hydrated regularly, avoiding the sun at the hottest hours, and checking in on the most vulnerable neighbors must be kept.
The Canicule Info Service number (0 800 06 66 66) remains reachable, and with heat boosting ozone pollution, we check the air quality with Airparif. To cool off a bit, we head to the good spots where se rafraîchir à Paris et en Île-de-France, or take a dip at one of the sites de baignade surveillés de la Seine et de la Marne, open for summer 2026.
