An intense heat dome trapping warm air from northern Africa and compressing it over western Europe pushed the UK to historic extremes this week. The Met Office officially confirmed the UK recorded a “tropical night” overnight into Tuesday, May 26, as minimum temperatures failed to drop below 20°C in several areas.
This milestone follows Monday’s scorching daytime highs where Kew Gardens in southwest London hit 34.8°C (94.6°F). To understand exactly why this air mass isn’t moving, you have to look at how the Omega block weather pattern drives extreme heat and floods by stalling weather systems for days at a time. The new peak officially shatters the UK’s previous all-time May record of 32.8°C, which was originally set in 1922 and tied in 1944.
The Regional Heat Dome
The extreme conditions stretch across the English Channel. On Monday, an unprecedented May heatwave drove France to its hottest May day since national measurements began. The countrywide average reached 24.4°C, breaking the previous 1944 record of 23.7°C.
French authorities confirmed the rapid temperature spike turned dangerous quickly. At least seven recent fatalities have been linked directly or indirectly to the extreme heat, including incidents of sudden drowning and hyperthermia during outdoor athletic events. French Prime Minister Sébastien Lecornu convened an emergency meeting with key ministers to assess government preparations, while local authorities were ordered to implement health protections for all public sporting events.
Infrastructure Under Pressure
For the first time since the system was created in 2004, France activated its national heat warning system in May. Across the channel, the UK’s Climate Change Committee responded to the May temperature records that were broken by urgently recommending new policy mandates. The committee stated that British infrastructure is built for a climate that no longer exists.
They are now pushing to mandate air conditioning installations across all hospitals and care homes within the next 10 years, and in all schools within 25 years.