Portugal breaks national May temperature record with 40.3°C (104.5 °F) in Mora

Portugal experienced a record-breaking temperature for the month of May when the town of Mora reached 40.3°C (104.5°F), surpassing the previous national May high of 40°C (104°F) set in 1953 and matched in 2001. This extreme temperature was recorded during an early-season heatwave that began on May 20, 2026, primarily affecting the Alentejo region and the Tagus Valley. Alongside Mora, several other locations in Portugal also recorded exceptionally high temperatures, with 22 new maximum temperature records set across the country during the heatwave period. The heatwave's intensity was notable not only for breaking long-standing records in Portugal but also for its regional impact across Western Europe. In the United Kingdom, Kew Gardens recorded temperatures of 35.1°C (95.2°F) on May 26, breaking the UK May and spring temperature records for the second consecutive day. France also experienced unprecedented warmth, with May 26 marking the hottest May day on record nationally, averaging 24.9°C (76.8°F), and Angoulême-La Couronne reaching 37.8°C (100°F) on May 28. These temperature extremes are part of a broader pattern of early and intense heatwaves affecting the region. The heatwave has had serious consequences beyond temperature records, with confirmed fatalities linked to the extreme weather. The UK reported at least 11 open-water deaths during this period, while French authorities attributed seven deaths to the heatwave, including drownings and fatalities during athletic events. These incidents highlight the significant public safety risks posed by such extreme weather events, especially when they occur unusually early in the season. This heatwave underscores growing concerns about climate variability and the increasing frequency of extreme weather events in Europe. The early onset and severity of the heatwave may have implications for public health, agriculture, and energy demand, emphasizing the need for enhanced preparedness and adaptation strategies in the face of climate change.