Spectators wear hats against the heat during the final of the Bad Homburg Open WTA tennis tournament in Bad Homburg, Germany, Saturday, June 27, 2026. (AP Photo/Michael Probst)

A stork approaches its nest in Wehrheim near Frankfurt, Germany, Friday, June 26, 2026. (AP Photo/Michael Probst)

A one-week-old sparrow kitten that fled out of its nest due to the hot temperatures sits on the hand of a veterinarian in Wehrheim near Frankfurt, Germany, Friday, June 26, 2026. (AP Photo/Michael Probst)

A one-week-old sparrow kitten that fled out of its nest due to the hot temperatures is fed with flies by a veterinarian in Wehrheim near Frankfurt, Germany, Friday, June 26, 2026. (AP Photo/Michael Probst)

People cool off at Trocadero fountain near the Eiffel Tower during a heat wave in Paris, Wednesday, June 24, 2026. (AP Photo/Christophe Ena)

A worker drinks water on a construction site during high temperatures in Boulogne Billancourt, outside Paris, Wednesday, June 24, 2026. (AP Photo/Christophe Ena )

A person cools off at Trocadero fountain near the Eiffel Tower during a heat wave in Paris, Wednesday, June 24, 2026. (AP Photo/Christophe Ena)

A drugstore sign shows the temperature of 41 degrees Celsius (105,8 degrees Fahrenheit) in Bordeaux, southwestern France, on Tuesday, June 23, 2026, as the national weather service, Meteo France, placed 54 departments, about half the country, under a red heat wave alert. (AP Photo/Caroline Blumberg)