Heat Dome Traps Warm Air Over Western Europe, UK Records Hottest May Day

Western Europe’s unusually early heat wave broke temperature records as a heat dome trapped warm air over the region, with the United Kingdom recording its hottest day on record for May at Kew Gardens in London.

“In France, authorities placed several western départements under a yellow heatwave alert from Monday lunchtime as temperatures climbed far above seasonal averages”

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The temperature at Kew Gardens hit nearly 95 degrees Fahrenheit on Monday and then rose to 95.2 degrees on Tuesday, while France and Spain also saw similar highs amid the same late-season surge.

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In France, the heat arrived before lifeguards typically start their watches at popular beaches, and a French government spokesperson told the Associated Press that at least seven recent deaths were likely heat related, including five drownings.

The heat wave’s timing and intensity were linked to a weather phenomenon described as a heat dome, which trapped warm air from northern Africa over Western Europe, and scientists said human-caused climate change likely played a role in the extreme temperatures.

The death toll reported by authorities and correspondents diverged, with the BBC describing dozens of garment workers killed in Narayanganj, while here in Europe multiple outlets tied heat to drownings and other fatalities during the early heat wave.

In Britain and France, the Associated Press reported that Maud Bregeon said there were reports of at least seven deaths potentially related to high temperatures, including five drownings and two deaths in sports competitions.

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The UK Health Security Agency issued an amber health alert for large parts of the country through Thursday, warning of a potential health risk particularly among older people at the hottest times of the day.

In France, the French government spokesperson Maud Bregeon told TF1 that there were "seven deaths directly or indirectly linked to the heat, including at least five from drowning" and also deaths related to extreme heat during sports events.

In London, the Met Office said Tuesday was the hottest day in May on record with Heathrow and Kew Gardens provisionally reaching 35 degrees Celsius, and it also reported a rare "tropical night" on Monday when temperatures did not fall below 20C.

Beyond immediate fatalities, the sources described risks to infrastructure and public health as the heat wave persisted, with the UK issuing heat health alerts across many areas of England until Wednesday as temperatures hovered in the 90s.

“- Published If you take a look across western Europe at the moment, you'll struggle to find many places escaping the heat”

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Inside Climate News reported that a new government-backed report warned the nation is “built for a climate that no longer exists,” and it said the report flagged how water systems are pushed to the brink and outdated infrastructure fails to protect the public from the hottest temperatures.

The same Inside Climate News account said hotter heat waves could cause overheating in more than 90 percent of homes in the U.K. by 2050, and it tied the danger to homes built to withstand cold weather that trap heat during sweltering summers.

The Guardian reported that the UK’s Climate Change Committee said cooling must be rolled out at scale, and it quoted report co-author Julia King saying, "Extreme heat is certainly the most deadly of the climate impacts on the U.K., so we need to see cooling rolled out at scale."

In parallel, the Guardian described how heat health alerts and projected mortality concerns were linked to the need for adaptation, including calls for air conditioning in care homes and hospitals within the next 10 years and in all schools within 25 years.