A police officer givers water to a British soldier wearing a traditional bearskin hat, on guard duty outside Buckingham Palace, during hot weather in London, Monday, July 18, 2022. (AP Photo/Matt Dunham)

Traffic crosses a bridge at Woodhead Reservoir in West Yorkshire, England, Monday, July 18, 2022, as water levels dip dangerously low amid record high temperatures in the UK. (AP Photo/Jon Super)

A railway worker hands out bottles of water to passengers at King's Cross railway station where there are train cancellations due to the heat in London, Tuesday, July 19, 2022. (AP Photo/Kirsty Wigglesworth)

People take part during the annual water fight in the streets of the Vallecas neighborhood of Madrid, Spain, Sunday, July 17, 2022. (AP Photo/Manu Fernandez)

A rider tucks an ice pack made with women's nylon stockings under his jersey during the sixteenth stage of the Tour de France cycling race over 178.5 kilometers (111 miles) with start in Carcassonne and finish in Foix, France, Tuesday, July 19, 2022. (AP Photo/Daniel Cole)

People paddle on the river Spree and pass the Badeschiff, Bathing Ship, pool in Berlin, Germany, Tuesday, July 19, 2022. (AP Photo/Markus Schreiber)

Swimmers walk on the Le Moulleau pier in Arcachon, southwestern France Monday July 18, 2022, as a large cloud of black smoke laden with ashes coming from a giant wildfire consuming the thousand-year-old forest bordering the Dune du Pilat fills the sky. (AP Photo/Sophie Garcia)

A man rests on a bench while cooling himself with water from a public sprinkler on a hot and sunny day in Barcelona, Spain, Saturday, July 16, 2022. (AP Photo/Emilio Morenatti)

A woman holds an umbrella to shelter from the sun during a hot sunny day in Madrid, Spain, Monday, July 18, 2022. (AP Photo/Manu Fernandez)

Members of the Australian cabaret and Circus troupe cool down in a fountain on the Southbank in London, Tuesday, July 19, 2022. (AP Photo/Frank Augstein)