 Jason Allen, CBS News, Corpus Christi, Texas. About 130 million Americans are under threat from a long-running heat wave. CBS News Los Angeles reporter Luzelia Cabrera is in Palmdale, California. Working in the heat, it really drains you. Sofia Perez is a lifeguard at Marie Kerr Pool and says she's thankful outside workers have additional protections out here in this heat. Our management does a really great job of keeping us cool. She also takes several other steps to protect herself.