A sign warns hikers of trail closures due to extreme heat at Camelback Mountain on Thursday, March 19, 2026, in Phoenix. (AP Photo/Rebecca Noble)

Enrique Martinez carries his 11-year-old dog Pepe so it doesn't have to walk on the hot sand at Crissy Field in San Francisco, Tuesday, March 17, 2026. (AP Photo/Godofredo A. Vásquez)

A man runs past at Crissy Field, backdropped by the Golden Gate Bridge in San Francisco, Tuesday, March 17, 2026. (AP Photo/Godofredo A. Vásquez)

A jogger runs past as a man sunbathes at Crissy Field in San Francisco, Tuesday, March 17, 2026. (AP Photo/Godofredo A. Vásquez)

People lounge in the sand at Crissy Field East Beach backdropped by the Golden Gate Bridge in San Francisco, Tuesday, March 17, 2026. (AP Photo/Godofredo A. Vásquez)

FILE - Driver Daniel Dye (43) is seen during qualifying for the NASCAR Weather Guard Truck Series, March 16, 2024, in Bristol, Tenn. (AP Photo/Wade Payne, File)

FILE - Roswell Schaeffer, an Inupiaq hunter and fisher, takes his great-grandson James Schaeffer, 7, and James' cousin Charles Gallahorn, 10, hunting in Kotzebue, Alaska, Sept. 26, 2025. (AP Photo/Annika Hammerschlag, File)

Roswell Schaeffer, an Inupiaq hunter and fisher, organizes hunting equipment next to his covered snowmobile outside his home in Kotzebue, Alaska, Friday, Sept. 26, 2025. (AP Photo/Annika Hammerschlag)