Rain and storms are possible for parts of the Central and Eastern U.S. the Fourth of July weekend. Cities like Chicago, Detroit and Minneapolis could see multiple rounds of rain and storms. The storms will spread out by Sunday, so cities from Atlanta to New York City could see some poor weather by the end of the weekend. But the major threat for the holiday weekend is the heat as temperatures soar into the 90s and heat indices pass the 100 degree mark for many. Meteorologist Sara Tonks breaks it down.