From: 29/07/2026, 12:00
To: 05/08/2026, 20:00

- Warning valid below 800 m a.s.l. - Possible impacts: Significant risk of circulatory problems and physical discomfort. - Recommendations for action: Drink at least 1.5 litres per day, preferably unsweetened and non-alcoholic drinks. Avoid physical exertion at the hottest time of day. Follow the recommendations of the Federal Office of Public Health FOPH. - Highest temperatures and humidity: 31 - 36 °C, 30 - 45 % - Lowest night temperatures: 18 - 22 °C - Peak phase of the event: Wed 12 - Fri 16 - Temporary mitigation: due to thunderstorms on, Fri 31.07.2026

From: 31/07/2026, 14:00
To: 01/08/2026, 03:00

- Possible impacts: Lightning strikes. Breaking off of branches, toppling of individual trees. - Recommendations for action: When planning outdoor activities, take into account any available protections and alternative routes. Avoid bodies of water and areas at risk of lightning strikes, such as mountain ridges, trees, pylons or towers as well as open terrain (e.g. clearings, football pitches). Secure outdoor objects and retract any awnings. In open terrain, if lightning strikes nearby, assume a crouched position (with your feet together) with as little of your body as possible touching the ground (do not lie down flat). - Thunderstorm type: moving thunderstorms - Peak phase of the event: -