You might see more people wearing a neck cooling fan to fight the summer heat. But can they really help? We talk to experts about how our bodies deal with heat — and to people using the fans.

Summer in the Eastern half of the U.S. kicked off with a massive heat wave, and the summer season is only just beginning. So, how should you prepare your home and community for the next big heat wave?

Expect a heat index of 105-110 degrees on Friday. A heat advisory is in effect for South Florida and the Treasure Coast.