According to Météo-France, this Sunday afternoon, high temperatures will remain very high, particularly from the central-east to the northeast, where they will approach or even exceed 40 degrees. In the southwest, temperatures will remain steady or drop slightly compared to yesterday, mainly due to high clouds moving in from Spain.In Poitou-Charentes, maximum temperatures could reach 34°C in Charente and Deux-Sèvres, and even 35°C in Vienne. Biometeorological indicators are nearing the thresholds in Charente and Vienne today. They are expected to remain below the thresholds throughout the region in the coming days. Météo-France recommends maintaining an Orange alert for the Charente department and a Yellow alert for Vienne this Sunday. Emergency service activity shows a significant increase in the Heat Index for August 18, particularly in Vienne (75% of calls related to the Heat Index). Six of the 16 calls involved people aged 75 and older.