People watch the setting sun at the end of a hot summer day, Sunday, July 26, 2026, in Kansas City, Mo. (AP Photo/Charlie Riedel)

People cool off in the shade under a tree during hot weather at Montrose beach in Chicago, Wednesday, July 15, 2026. (AP Photo/Nam Y. Huh)

Madison Hermes, 11, carries a doll as she cools off with water fountains on a hot summer day in downtown Dallas, Monday, July 27, 2026. (AP Photo/LM Otero)

People walk on a sandbar underneath the Danube's Margareth Bridge in downtown Budapest, Hungary, Wednesday Aug. 5, 2026, as the river, which runs through 10 European countries, has receded never-before-seen low water levels. (AP Photo/Bela Szandelszky)

A Serbian Army helicopter battles a fire in Deliblatska Pescara (Deliblato Sands), near the village of Sumarak, 70 kilometers north-west of Belgrade, Serbia, Friday, Aug. 7, 2026. (AP Photo/Darko Vojinovic)

A firefighters helicopter battles a fire in Deliblatska Pescara (Deliblato Sands), near the village of Sumarak, 70 kilometers north-west of Belgrade, Serbia, Friday, Aug. 7, 2026. (AP Photo/Darko Vojinovic)

smoke emerges from a forest during a wildfire in Deliblatska Pescara (Deliblato Sands), near the village of Sumarak, 70 kilometers north-west of Belgrade, Serbia, Friday, Aug. 7, 2026. (AP Photo/Darko Vojinovic)

A boy cools himself off in a fountain on a hot summer day in Moscow, Thursday, Aug. 6, 2026. (AP Photo/Pavel Bednyakov)