More than a third of U.S. residents were given warnings, watches, and advisories for extreme heat.Temperatures from the blistering heat wave continue to climb to triple-digit figures across the Southwest and California.Officials have opened cooling centers to protect the homeless and elderly who are more vulnerable to the heat.More than a third of Americans were
Over a third of America's residents were given warnings of extreme heat as temperatures continue to climb to triple-digit figures across the Southwest.