Swimmers keep cool in the hot weather in an open-air pool in Letchworth Garden City, Hertfordshire, England, Tuesday May 26, 2026. (Joe Giddens/PA via AP)

A view of the beach as people enjoy the hot weather in Brighton, East Sussex, England, Tuesday May 26, 2026. (Gareth Fuller/PA via AP)

A woman shelters from the sun with a city guide in downtown Rome as temperatures are expected to reach 32 degrees Celsius (89.6 Fahrenheit), Tuesday, May 26, 2026. (AP Photo/Gregorio Borgia)

A woman drinks water from a frozen bottle in downtown Rome as temperatures are expected to reach 32 degrees Celsius (89.6 Fahrenheit), Tuesday, May 26, 2026. (AP Photo/Gregorio Borgia)

People visit Bournemouth beach, south England, Monday May 25, 2026. (Andrew Matthews/PA via AP)

People enjoying the warm weather on Sunny Sands beach in Folkestone, England, Saturday May 23, 2026. (Gareth Fuller/PA via AP)

A man cools down with a bottle of water during the hot weather on Westminster Bridge, central London, England, Monday, May 25, 2026. (James Manning/PA via AP)

Tourists shelter from the sun beneath umbrellas during the hot weather on Westminster Bridge, central London, England, Monday, May 25, 2026. (James Manning/PA via AP)