# Heatwave and thunderstorms across France, Belgium, Algeria > Live situation record from CLSTR: https://clstr.news/situations/heatwave-and-thunderstorms-across-france-belgium-algeria > Updated: 2026-08-02T23:01:41.000Z. Sources: 40. Developments: 2. By early August 2026 the heatwave that had covered France, Belgium and Algeria intensified, with daytime temperatures reaching 37‑38 °C and tropical nights above 20 °C. Orange heat‑wave alerts remained in place while a cooler Atlantic air mass triggered violent thunderstorms across France from 2 August onward. The storms produced rapid temperature drops of 15‑20 °C, wind gusts exceeding 100 km/h, heavy rain and hail up to 50 mm, and caused microbursts. Over half of France’s departments were under orange vigilance for heat and yellow or orange warnings for storms, flooding and strong winds. In Alsace, temperatures topped 37 °C and Strasbourg closed several parks and cemeteries as a precaution. Météo‑France warned that the combination of extreme heat, ozone‑related air‑quality degradation and intense storms posed heightened risks to health, agriculture and infrastructure, urging the public to stay hydrated, avoid prolonged exposure and monitor local alerts. Damage reports from Savoie and Haute‑Savoie described torn roofs, broken windshields, uprooted trees and disrupted camping sites. Humidity of 50‑60 % amplified the heat, and yellow storm warnings were issued for Bourgogne‑Franche‑Comté. The combined heat and storm activity was expected to ease later in the week as cooler Atlantic air moved in, but elevated temperatures and localized storm risks persisted in the east and southeast through the weekend, extending public safety advisories. ## Claims - Belgium placed almost the entire country under an orange heat alert with temperatures up to 36 °C. (corroborated by 5 sources) - Maximum temperatures in France reached up to 38 °C during early August 2026. (corroborated by 4 sources) - Health authorities advised the public to stay hydrated, avoid prolonged sun exposure, and seek cooler indoor environments during the heatwave. (corroborated by 4 sources) - Strong thunderstorms are forecast for Monday‑Tuesday across France, with wind gusts up to 100 km/h. (corroborated by 3 sources) - The heatwave is expected to persist through early August across France, Belgium and Algeria. (corroborated by 3 sources) - France’s Côte‑d’Or department was placed under double yellow vigilance for heat and thunderstorms on Monday 3 August, with temperatures expected up to 37 °C. (corroborated by 2 sources) - Algeria issued weather alerts for thunderstorms and extreme heat, with temperatures projected up to 45 °C in southern wilayas. (single source) - France maintained orange heat vigilance in 20 eastern and southeastern departments, with temperatures of 33‑37 °C. (single source) - Fire‑risk alerts cover nine French departments, with heightened danger of forest fires. (single source) - The Netherlands activated its national heat plan, issuing a code‑yellow warning for temperatures between 28 °C and 36 °C on Monday and Tuesday. (single source) - Forecasts for the Netherlands on Monday and Tuesday called for temperatures of 30‑35 °C with possible thunderstorms. (single source) - Belgium’s 2026 summer has an 80 % probability of becoming the hottest on record, according to meteorologists. (single source) ## Timeline ### 2026-08-02: France hit by heatwave and violent thunderstorms France endures a heatwave with temps over 37 °C and violent thunderstorms producing 100 km/h gusts, hail and damage, prompting widespread vigilance alerts. 17 sources. https://clstr.news/cluster/severe-thunderstorms-trigger-rapid-temperature-drops-across-france ### 2026-07-31: Belgium and France issue orange heat alerts as temperatures near 37 °C Belgium, France and the Netherlands issue heat alerts as temperatures approach 37 °C, with thunderstorms expected and health warnings issued. 25 sources. https://clstr.news/cluster/three-french-departments-stay-under-yellow-thunderstorm-alert --- Cite as: Heatwave and thunderstorms across France, Belgium, Algeria. CLSTR, https://clstr.news/situations/heatwave-and-thunderstorms-across-france-belgium-algeria