Credit: Ali Sahib, Chronicle.lu

On the morning of Sunday 28 June 2026, Luxembourg’s Risk Assessment Unit for Severe Weather and Flooding (CERI) held a meeting where it provided an interim assessment following the recent episode of high temperatures, during which readings reached up to 40°C.

According to CERI, since the weekend of Saturday 20 and Sunday 21 June, operational activity at the Grand-Ducal Fire and Rescue Corps (CGDIS) had increased significantly (+70%), with a notable rise towards the end of the week, mainly in emergency assistance for individuals.

CERI said that thanks to coordinated anticipation between the various stakeholders, additional resources were mobilised, including ambulances from the Luxembourg Army and approved rescue organisations such as the Red Cross and Luxambulance.

In the health sector, an increase in emergency department attendances linked to high temperatures had been observed. At this stage, the situation remains generally under control, despite an increased workload.

CERI stressed that, in accordance with the principles of the government “severe weather and flooding” plan, anticipation, coordination and close cooperation between administrations, emergency services and public authorities have enabled an effective and proportionate response to the situation.

According to forecasts from MeteoLux, a risk of locally severe thunderstorms is expected during Monday 29 June. These may be accompanied by gusts of wind, heavy rainfall and lightning strikes, which may cause localised damage and disruption.

In this context, the CERI calls on the public to take preventive action to avoid damage and to exercise particular caution, in particular to:

⁃ secure objects sensitive to wind (outdoor furniture, temporary installations, etc.);

⁃ ensure that storm drains are kept clear;

⁃ limit non-essential travel in the event of thunderstorms;

⁃ avoid sheltering under trees, particularly isolated ones;

⁃ avoid walks in forests and exposed areas.

Although the situation remains under control, CERI emphasised that the combined effects of heat and storm events may still have impacts in the coming hours and days. It calls on everyone to maintain efforts and not to relax vigilance, particularly towards the most vulnerable people (elderly people, children, and those who are isolated or vulnerable).

Participants in CERI

High Commission for National Protection (HCPN), MeteoLux, Directorate of Health, Grand-Ducal Fire and Rescue Corps (CGDIS), Grand Ducal Police, Luxembourg Army, Ministry of National Education, Children and Youth, Ministry of the Interior, Customs and Excise Administration, Labour and Mines Inspectorate