A record-breaking heat wave envelopes the northeast this week with temperatures approaching 100 degrees Fahrenheit. 

A "heat dome" parking itself over the region gives the heat wave its unusual duration with blazing temperatures to last several days. The heat wave causes a serious health risk, particularly to the elderly and those working outside.

Tim Bruno spoke to Mark Pellerito, a warning coordination meteorologist with the National Weather Service, about the heat wave and how to stay safe.