August Heatwave Sweeps French Alps and Northern Italy
Hey everyone, let’s talk about the intense heatwave that’s been sweeping across parts of southwestern Europe. Between the 12th and 13th of August 2025, record-breaking temperatures have been recorded in the French Prealps, the Italian regions of Piedmont and Liguria, and even in parts of Switzerland’s Romandy. Météo France has issued several alerts, with red warnings in multiple French departments as temperatures soared past 40 degrees Celsius in many areas.
In the Isère region of southeastern France, the heat is particularly severe. The department has been placed under a red heat alert, which will remain active until Thursday morning, the 14th of August. Over the past 24 hours, temperatures in the Rhône Valley have reached extreme highs, including a staggering 41.8 degrees in Sablons, tying the previous August record from 2023. Other towns in the valley have seen similar spikes: Bourgoin-Jallieu reached 40 degrees, equaling the 2003 heatwave record, while Beaurepaire climbed to 40.3 degrees and Romans-sur-Isère recorded 42.6 degrees. Cities like Dijon and Lyon also touched the 40-degree mark, while Annecy registered 38.7 degrees.
Further south, in Provence and the Var department, high temperatures continue to persist. Cogolin recorded 41 degrees, Trets 40.5 degrees, Aubagne 38.6 degrees, and Hyères 35.4 degrees. Nighttime temperatures have stayed unusually high, exceeding 28 degrees along the coast, with minima expected around 29 degrees in Nice and 28 degrees in Menton tonight. On the coast, daytime highs are predicted to reach 32 to 34 degrees, while inland areas such as Draguignan, Le Luc, and Saint-Zacharie could see 35 to 36 degrees. Interestingly, the sea temperature near Marseille is around 25 degrees, right on par for this season.
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Even Mont Blanc has been affected by this unusual heat. On August 11th, the zero-degree altitude was measured at 5,113 meters, higher than normal, highlighting how persistent the heatwave has been.
But it’s not just scorching temperatures—severe thunderstorms are expected this afternoon over the southern Alps and inland areas of France. Strong winds of up to 100 km/h, hail, and heavy rains are possible in the Haut-Var and alpine valleys like Vésubie and Tinée, with orange alerts issued in Hautes-Alpes and Alpes-de-Haute-Provence. Residents are advised to stay indoors, avoid trees and rivers, and protect exposed property.
The heatwave isn’t limited to France. Switzerland’s Romandy and Valais are experiencing highs of 35 to 36 degrees, with Geneva and Sion possibly reaching 37. In Italy, Turin could hit 37 degrees, while Verbania and Vercelli may see 35 degrees, and Genoa has already recorded 40 degrees. The Ligurian coast has even set nighttime records, with temperatures remaining over 32 degrees in Alassio. A slight drop in temperature is expected tomorrow, but the heat remains persistent across the region.
So, if you’re traveling through the Alps or southern Europe right now, be prepared: stay hydrated, keep cool, and watch the sky for those approaching storms.
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