The red heatwave alert remains in effect in Paris and across the Île-de-France this Wednesday, June 24 and Thursday, June 25, 2026, with temperatures flirting with 40°C and sleepless nights. Météo-France confirms the prolongation of this exceptionally intense spell, comparable to the August 2003 heatwave.
Paris and the entire Île-de-France region remain under red heatwave alert from Météo-France on Thursday, June 25, 2026. After the orange alert was triggered on June 18, then the red alert on June 21, the capital and its inner suburbs (Hauts-de-Seine, Seine-Saint-Denis, Val-de-Marne) are enduring sweltering days. Temperatures peak between 39 and 42°C, and nights refuse to fall below 25–26°C. Météo-France’s bulletin confirms the episode will continue, described as exceptionally intense, comparable to the August 2003 heatwave, but with an unprecedented early onset.
This Wednesday, June 24, at 5 a.m., the thermometer already read 26°C at the Paris Montsouris station, with nocturnal temperatures potentially unprecedented for the season. The extreme heat even pushed northward to Hauts-de-France, where the departments of Aisne, Somme, Nord, and Pas-de-Calais joined the red alert at 12:00 on Wednesday.
The red alert is the top tier of the national heatwave plan. It is activated when the episode is exceptional in duration, intensity, and geographic extent, with health impacts that could affect the entire population, not just the vulnerable.
According to Météo-France, this Thursday marks the expected end of the heatwave stretch, with highs still hovering around 40°C across the Île-de-France region, from Cergy (95) to Melun (77). Expect new records to be set, even when looking across all months. The day is shaping up to be another stifling one.
The question on everyone's lips. Forecasts point to a gradual drop in temperatures starting along the Atlantic coast from Friday, June 26, though Météo-France remains cautious about confirming the outlook for Île-de-France. On the Mediterranean coast, the Var, Bouches-du-Rhône and Vaucluse will also be placed back under yellow alert from 6 a.m. this Thursday.
For Paris and the interior regions, the heat would remain intense on Friday, hovering between 35 and 38°C, far from a real lull. The weekend of June 27–28 could bring more noticeable relief, with possible storms. But don't get carried away: homes heated for over a week won't cool off overnight, even if outdoor temperatures dip a few degrees. To track how it evolves, check the Météo-France vigilance map, updated twice daily.
The heat wave is also intensifying air pollution. According to Airparif, the air quality monitoring body for Île-de-France, ozone levels far exceed the usual 180 µg/m³ threshold. In response, the police prefecture is maintaining differentiated traffic restrictions: only vehicles with a Crit'Air 0, 1 or 2 badge are allowed to circulate within the area encircled by the A86, and speed limits remain reduced by 20 km/h on the affected routes. To check whether your vehicle is allowed, visit certificat-air.gouv.fr.
On the transport front, the intense heat is prompting train cancellations on certain Île-de-France lines. Travelers are planning their trips on oui.sncf and should check Sortiraparis's full update on the transport disruptions in Île-de-France caused by the heatwave.
At these temperatures, even young, healthy people can fall victim to heatstroke. ARS Île-de-France and the City of Paris remind the public of the proper precautions:
The capital city has nearly 1 400 cooling havens freely accessible: shaded parks, museums, libraries, swimming pools, and religious buildings. Note that many museums, monuments and cultural venues are adjusting hours or closing due to the heat—it's best to check before you head out. The green helpline Canicule Info Service (0 800 06 66 66) remains open from 9 a.m. to 7 p.m. for advice, and we should look in on our elderly or isolated neighbors, who are especially vulnerable to this prolonged heat.
Dates and Opening Time
From June 24, 2026 to June 25, 2026
Location
Paris
75 Paris
