Summer got off to a sizzling start Monday as a deadly heat wave sent temperatures soaring across the Southwest again and forecasters warned the mercury could hit anywhere from 120 to 125 degrees this week.
Excessive heat warnings and heat advisories were in effect across Southern California, Nevada and Arizona, affecting 25 million Americans, the National Weather Service reported.
Another heat-related death in Arizona was confirmed Monday, when authorities said a woman walking on a multi-use path called The Loop collapsed and died Sunday night in Tucson. The deaths of four people in Arizona over the weekend were confirmed Sunday.
Meanwhile, the searing temperatures were complicating the battle against explosive wildfires that have already scorched tens of thousands of acres in the region, forcing evacuations throughout the Southwest.