The United Kingdom smashed a century-old temperature record for the second time in 24 hours on Tuesday as a spring heat wave scorches parts of Western Europe, triggering government warnings about risks to life. Several drownings were reported in Britain and France as people tried to cool down.

A temperature of 35.1 degrees Celsius (95.2 degrees Fahrenheit) was recorded at London’s Kew Gardens, Britain’s Met Office weather service said, breaking the 34.8 C (94.6 F) record set a day earlier at Kew. The provisional readings smashed the long-standing record of 32.8 C (91.4 F) set in 1922 and matched in 1944.

London also recorded a rare “tropical night,” defined as one in which the temperature does not fall below 20 C (68 F).

Records also fell in France, where temperatures reached 36 C (97 F) on Monday in the country’s southwest and widely remained above 20 C at night.

The national weather service, Météo-France, said a “heat dome,” with heat held in place by a high-pressure weather front, was producing temperatures more than 10 degrees Celsius above what is usual for this time of year.

Unpredictable and extreme weather is becoming more frequent as Earth warms. Experts say unprecedented and deadly weather extremes that sometimes strike at abnormal times and in unusual places are putting more people in danger.

“We know beyond a shadow of a doubt that heat wave events such as this have been made more likely and more severe due to climate change arising from our emissions of heat-trapping greenhouse gases,” said Peter Thorne, director of the ICARUS Climate Research Centre, at Maynooth University, in Ireland.