A vendor pulls out a bottle of water from a tank using dry ice to keep it cold, during a heat wave at the Great American State Fair on the National Mall, Thursday, July 2, 2026, in Washington. (AP Photo/Alex Brandon)

A man wipes sweat off of his head while attending the Great American State Fair, on the National Mall, Wednesday, July 1, 2026, in Washington. (AP Photo/Jacquelyn Martin)

Visitors and members of the National Guard rest in the shade of a tent while attending the Great American State Fair on the National Mall, Wednesday, July 1, 2026, in Washington. (AP Photo/Nathan Howard)

Stephanie McCallister holds a cold bottle of water to her husband Don McCallister's neck as they wait in line for the ferris wheel at the Great American State Fair on the National Mall, Wednesday, July 1, 2026, in Washington. (AP Photo/Jen Golbeck)

Visitors wait to enter the Washington Monument, Wednesday, July 1, 2026, in Washington. (AP Photo/Tom Brenner)

People cross 15th Street Northwest as a National Guard Humvee blocks the roadway, Wednesday, July 1, 2026, in Washington. (AP Photo/Tom Brenner)

Children reach for cold bottles of water from U.S. National Park Police Officer R. Douglass as they wait in line for the ferris wheel at the Great American State Fair on the National Mall, Wednesday, July 1, 2026, in Washington. (AP Photo/Jen Golbeck)

Emmanuel Lopez tries to cool off during a run from hot weather at Dodge Fountain at Hart Plaza in Detroit, Tuesday, June 30, 2026. (AP Photo/Paul Sancya)