Valid: from 29.7. 12:00 to 5.8. 20:00
- Warning valid below 800 m a.s.l.
- Possible impacts: Severe risk of circulatory problems and physical discomfort.
- Recommendations for action: Drink at least 1.5 litres per day, preferably unsweetened and non-alcoholic drinks. Keep your body cool: seek shade and cool rooms, protect yourself with suitable clothing, headgear and sunscreen, shade windows and ventilate your home early in the morning. Avoid physical exertion at the hottest time of day. Follow the recommendations of the Federal Office of Public Health FOPH.
- Highest temperatures and humidity: 32 - 38 °C, 30 - 45 %
- Lowest night temperatures: 19 - 23 °C
- Peak phase of the event: Wed 12 - Fri 16
- Temporary mitigation: due to thunderstorms on, Fri 31.07.2026
General advice in the event of a heatwave:
- Solar radiation is at its strongest between 11 a.m. and 3 p.m., with the hottest time in the late afternoon (3 p.m. to 6 p.m.), so restrict activities in the open air to morning and evening, and where possible remain in the shade.
- Avoid vigorous physical activity wherever possible. If you are doing any physical activity, hydrate sufficiently (with cool, alcohol-free drinks).
- Protect yourself from direct sun (with shade, appropriate clothing, head covering, sunglasses, sunscreen etc.
- Wear loose, light-coloured clothing.
- Ensure that your body gets sufficient liquid (at least 1.5 to 2 litres a day), and compensate for salt and water loss simultaneously. Water containing sodium, juices, soups, fruits with a high water content, such as melons, cucumbers, tomatoes, strawberries and peaches, are all useful for hydration.
- Eat fresh, cool and light meals, and spread these out over the course of the day.
- Compensate for salt loss during or after sporting activities.
- Make the most of the lower night-time temperatures: allow plenty of outside air to circulate through buildings.
- Cool down with a cool shower or bath.
21°
