A thunderstorm moves over the beach of the Baltic Sea in Travemuende, Germany, late Saturday, June 20, 2026. (AP Photo/Michael Probst)

People swim in an outdoor swimming pool in London, Tuesday, June 23, 2026 as a heat wave is predicted across Britain.(AP Photo/Alberto Pezzali)

A man drinks on Westminster Bridge in London, as a heat wave is predicted Tuesday, June 23, 2026. (AP Photo/Kirsty Wigglesworth)

Parisians bath in the Canal Saint-Martin in Paris, as the national weather service, Meteo France, placed 54 departments, about half the country, under a red heat wave alert, Tuesday, June 23, 2026. (AP Photo/Christophe Ena)

Two young women refresh under a water mister in Lille , northern France, Monday June 22, 2026. (AP Photo/Jean-Francois Badias)

Tourists use umbrellas to shelter from the sun as they visit the historical Spanish steps in Rome, Tuesday, June 23, 2026. (AP Photo/Alessandra Tarantino)

An African penguin cools off in a basin in Kronber zoo, near Frankfurt, Germany, Tuesday, June 23, 2026. (AP Photo/Michael Probst)

A family walks through a cooling water spray at the Eiffel Tower in Paris, Sunday, June 21, 2026. (AP Photo/Michel Euler)