Heat warning: an orange alert has been issued for the south of the country on Wednesday, 13 August 2025. Reminder of recommended behaviour

Due to the orange alert heat warning issued by MeteoLux for the south of the country on Wednesday 13 August between 1 p.m. and 7 p.m., with maximum temperatures expected to reach 33–35°C and up to 36°C in urban areas, the Severe Weather and Flood Risk Assessment Unit (CERI) met today to analyse the situation.

The CERI would like to remind the public of the measures to take to limit the effects of the heat in the coming days:

• Drink lots of water regularly throughout the day (1.5 litres per day).
• Avoid going outside during the hottest hours of the day (11 a.m. to 9 p.m.) if you can.
• Close shutters, curtains and windows during the day and ventilate at night.
• Cover your head if you go outside.
• Wear light clothing.
• Limit physical activity.
• Stay in touch with vulnerable people around you. Accompany them to a cool place.

The CERI is not planning any further meetings, but the relevant services will continue to monitor the situation closely.

Further information: www.infocrise.lu

CERI participants: Haut-Commissariat à la protection nationale (HCPN), MeteoLux, ministère de la Santé et de la Sécurité sociale, Administration de la gestion de l'eau, Corps grand-ducal d'incendie et de secours (CGDIS).

Press release by the Cellule d'évaluation du risque intempéries et inondations (CERI)