‘A Silent Killer’: Extreme Heat and Your Health

This has been the hottest summer on record for nearly 100 US cities. Extreme heat isn't just uncomfortable, it can also cause a lot of harm -- even death. Dr. Sanjay Gupta talks to Dr. Gaurab Basu, a Harvard assistant professor and climate change expert about the very real effects of extreme temperatures on the human body.  Learn more about your ad choices. Visit podcastchoices.com/adchoices