 Mother Nature are turning up the heat for millions of Americans. Roughly 134 million people are under alerts for what the National Weather Service is calling an extremely dangerous and record-breaking heat wave. With parts of Florida, Ohio, the Southern Plains, and nearly all of the West Coast seeing surging temperatures, Phoenix, Arizona soaring above 115 degrees. Kids don't see the family car as dangerous, but just 10 minutes in a hot vehicle can be fatal.