The National Weather Service has issued a Heat Advisory for South Florida, promising sizzling days ahead, and emergency departments are already reporting an uptick in heat-related visits. When it

Forecasters have issued a heat advisory for Friday in Miami-Dade, Broward and Palm Beach counties, with temperatures expected to feel like 105 to 111 degrees. The advisory is in effect from 11 a.m. to 6 p.m.

Friday's heat index values will hover around 105 for Broward and Miami-Dade counties, but "feels like" temperatures could climb to as high as 111 degrees in parts of Southwest Florida. The heat advisory is in effect from 11 a.m. to 6 p.m.

The National Weather Service has issued a heat advisory for coastal northeastern South Carolina as a result of a high heat index through the weekend.

Heat is the deadliest weather threat, according to the National Weather Service’s report on weather-related fatalities. Here's how to stay safe.

The National Weather Service has issued a Heat Advisory for Charlotte, warning of heat indices up to 106 degrees, advising residents to take precautions.

A heat advisory is in effect in Boston and several other Massachusetts communities through 7 p.m. on July 17. The National Weather Service warned of "dangerous heat and humidity" with heat indices soaring to 95 to 100 degrees. Boston Mayor Michelle Wu also declared a heat emergency for the City of Boston from July 16 to 18.