On Tuesday 11 August 2026, Luxembourg's national weather portal, MeteoLux, issued a yellow weather warning (indicating "potential danger") for high temperatures in the south of Luxembourg.
The warning is in place from 12:00 on Wednesday 12 August until 07:00 on Thursday 13 August 2026.
According to MeteoLux, moderate heat stress is expected, with fatigue and heat exhaustion possible during prolonged exposure or physical activity. Temperatures in the south are forecast to reach 32°C to 34°C at the peak.
