Record-breaking heat wave puts strain on states' power grids

Much of the South and West have had no relief from the scorching heat. More than 46 million Americans are under heat advisories, with temperatures rising well above 100 degrees in some places. 

Palm Springs, California, hit 113 degrees on Wednesday, down from a record 120 degrees on Tuesday. Triple-digit temperatures are also expected in the Bay Area later in the week, according to CBS San Francisco.  The California Independent System Operator issued a heat bulletin urging residents to conserve energy as temperatures soared.