Sursee, Lucerne, Switzerland Severe Weather Alertstar_ratehome

- 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. 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. Keep in touch with at-risk people in your neighbourhood. Do not leave people or animals in parked cars. Follow the recommendations of the Federal Office of Public Health FOPH.
- Highest temperatures and humidity: 31 - 36 °C, 30 - 45 %
- Lowest night temperatures: 17 - 22 °C
- Peak phase of the event: Sun 12 - Tue 20
- Temporary mitigation: due to thunderstorms on,  Fri 19.06.2026