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UK issues 1st-ever 'red' warning for hot weather next week

The warning covers Monday and Tuesday when temperatures in England may reach 40 degrees Celsius.

LONDON, UK — British authorities issued their first ever "red" warning for extreme heat early next week, declaring a national emergency as forecasters predict record temperatures that will put even healthy people at risk of serious illness and death. 

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The warning covers Monday and Tuesday when temperatures in England may reach 40 degrees Celsius (104 degrees Fahrenheit) for the first time, the agency said. The highest temperature ever recorded in the U.K. is 38.7C (101.7F), set in 2019. The UK Health Security Agency increased its own alert to the highest level, warning of a "national emergency."

The alert comes as scientists say climate change is increasing the likelihood of exceptional heat waves in Britain, a country better known for gray skies and rain. The chances of temperatures like those forecast for next week are already 10 times higher than they would be without the influence of human activity, said Nikos Christidis, a Met Office climate scientist.

"We hoped we wouldn't get to this situation, but for the first time ever we are forecasting greater than 40°C (104 F) in the U.K.," Christidis said in a prepared statement. "In a recent study we found that the likelihood of extremely hot days in the U.K. has been increasing and will continue to do so during the course of the century."

Credit: pivotalweather.com
The GFS weather model predicts temperatures 17C (over 60F) above average in London on Tuesday

The U.K. Health Security Agency increased its own hot weather alert to the highest level, putting it to "national emergency." The warning system was created in 2004, when concerns about climate change spurred authorities to develop their first plan to protect the public from severed heat.

''At this level, illness and death may occur among the fit and healthy, and not just in high-risk groups," UKHSA said.

The weather alert, which covers a big chunk of England from London north to Manchester, also warns of potential disruption to air and rail travel and potential "localized loss of power and other essential services, such as water or mobile phone services."

Credit: metoffice.gov.uk
Health experts spell out the dangers of the coming heat wave (metoffice.gov.uk)

The two agencies issued lower level warnings earlier this week as large parts of the U.K. experienced higher than normal temperatures, although cooler weather prevailed Thursday and Friday. Temperatures are expected to rise in the coming days as the system that brought record highs to parts of Europe this week moves north over Britain.

Credit: AP
People enjoy the sunny weather on the banks of the river Thames near Hammersmith in London, Friday, July 15, 2022. British weather forecaster the Met Office has said temperatures are like to peak at the beginning of next week and has extended its Amber weather warning from Sunday to Tuesday.(AP Photo/Frank Augstein)

"Even as a climate scientist who studies this stuff, this is scary," said Professor Hannah Cloke, a natural hazards researcher at the University of Reading. "This feels real. At the start of the week I was worried about my goldfish getting too hot. Now I'm worried about the survival of my family and my neighbors."

Nigel Arnell, a professor of climate system science at the University of Reading, said Britain needs to prepare for more hot weather in the future, retrofitting buildings to cope with extreme weather and planting more greenery in cities.

Adaptation and resilience need to become a political priority, he said.

"We can't keep on dealing with extremes in crisis mode," Arnell said.

Watch: 100 degree heat hits California State Fair's opening weekend. Here's when things cool down

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