The skies over Île-de-France could turn electric without really cooling the atmosphere. Météo-France places Paris (75) and the seven other departments of Île-de-France (77, 78, 91, 92, 93, 94, 95) in yellow thunderstorm vigilance for Monday, July 13, 2026, while keeping the red heatwave vigilance, the highest alert level. An unusually double weather alert, on the eve of July 14 and on the evening of the Paris fireworks display.
In Paris, the yellow thunderstorm alert goes into effect from midnight tonight, the night between Sunday and Monday, and lasts until midnight the night between Monday and Tuesday. It thus covers the entire day of July 13.
The yellow level signals that locally dangerous phenomena are possible. In such a hot atmosphere, isolated thunderstorm bursts can erupt quickly, but their location and intensity remain hard to forecast. Météo-France also notes a low (and uncertain) risk of rain and thunderstorms across a large part of the western and northern region.
These storms do not spell the end of the sweltering heat — far from it. On Monday, the dawn low in the capital is expected to sit between 21 and 24°C, with nights that offer no relief. In the afternoon, the mercury climbs to between 33 and 36°C.
The cloud cover, more pronounced than in the days prior, still trims daytime highs by 1 to 3°C compared with Sunday. A hint of relief rather than real comfort: this Sunday, July 12, at 3:30 p.m., temperatures stood at 35.8°C at Paris-Montsouris and 34.2°C at Longchamp, with peaks expected between 35 and 38°C later in the afternoon.
On Tuesday, the stormy spell ends and temperatures rebound across Île-de-France. The mercury could approach 37°C on 14 July, the national holiday, with its parade and fireworks. A situation to monitor closely for anyone planning to spend several hours outdoors.
According to Météo-France, this severe and protracted heatwave is set to persist at least until the middle of next week, nationwide and in Île-de-France.
Until then, the guidance remains unchanged: stay hydrated regularly—don’t wait to feel thirsty—keep shutters closed during the day, seek cooled or naturally cooler spots, limit strenuous activity to the hottest hours, and check in on isolated or vulnerable people. The Canicule info service line remains reachable at 0800 06 66 66 (toll-free). In thunderstorms, it’s best to avoid makeshift shelters under trees and to steer clear of parks and riverbanks when showers hit.
