Western Europe Swelters Under Early Heat Dome as Records Break

Overview

• The heatwave, which struck Western Europe this week, forced temperatures up to about 15°C above normal and produced national and local May records including 35.1°C at Kew Gardens in London.
• Meteorological agencies say a persistent high‑pressure 'heat dome' has stalled over the region, advecting warm air from North Africa and preventing cooler Atlantic systems from entering.
• Authorities across the region have raised alerts and reported deaths: Italy declared red alerts for Rome, Florence, Bologna, Turin and Brescia, France has at least seven heat‑linked deaths, and UK water‑related fatalities linked to the heat have reached about ten.
• The heat is straining services and raising secondary hazards such as wild‑fire risk, water shortages and a spike in drownings as people seek relief in lakes and reservoirs.
• Climate experts and the UN link the event to human‑driven warming and the World Meteorological Organization warns that 2026–2030 is likely to remain at record or near‑record global temperatures, with an elevated El Niño risk that could push further extremes.