FILE - A hiker finishes his morning walk at the South Mountain Preserve to beat the high temperatures, July 11, 2019, in Phoenix. Parts of California, Nevada and Arizona are expected to bake this week as the first heat wave of the season arrives with triple-digit temperatures forecast for areas including Phoenix. Excessive heat warnings have been issued for most of the region from 10 a.m. Wednesday, June 5, 2024, to 8 p.m. Friday, June 7, due to the “dangerously hot conditions,” the National Weather Service in Phoenix said late Monday, June 3. (AP Photo/Matt York, File)