Attendees chant as they refuse to evacuate due to severe weather during a Salute to America Independence Day event honoring the nation's 250th anniversary, Saturday, July 4, 2026, on the National Mall in Washington. (AP Photo/Manuel Balce Ceneta)

People take cover in the Ronald Reagan Federal Building after evacuating the National Mall due to weather while attending Independence Day events honoring the nation's 250th anniversary, Saturday, July 4, 2026, in Washington. (AP Photo/Pablo Martinez Monsivais)

People dance in the street as they wait for the National Mall to reopen after being evacuated due to weather during Independence Day events honoring the nation's 250th anniversary, Saturday, July 4, 2026, in Washington. (AP Photo/Pablo Martinez Monsivais)

Attendees rest in the shade shortly before the event was closed for the afternoon due to extreme heat on the National Mall, Friday, July 3, 2026, in Washington. (AP Photo/Nathan Howard)

Attendees dip their hands in ice water at the Great American State Fair on the National Mall, Friday, July 3, 2026, in Washington. (AP Photo/Allison Robbert)

Egypt players hydrate and cool down as the weather nears triple digits during a training session in Dallas, Thursday, July 2, 2026, ahead of the team's World Cup soccer match against Australia. (AP Photo/Tony Gutierrez)

Meghana Jalagam uses a fan to keep cool from the hot weather during a World Cup soccer match between the United States and Bosnia and Herzegovina at a watch party Wednesday, July 1, 2026, in Detroit. (AP Photo/Paul Sancya)

The Lincoln Memorial, Washington Monument, and U.S. Capitol are seen at dawn as joggers run past an overlook in Arlington, Va., Friday, July 3, 2026. (AP Photo/J. Scott Applewhite)