Most of Ohio is under a heat advisory with temperatures that will feel 100-plus. Here's the difference between a heat advisory, heat watch and heat warning.

The National Weather Service is warning South Carolina residents to stay cool following a predicted heat index of 109 °F on Saturday, with hot temperatures continuing into next week.

The National Weather Service has issued a severe thunderstorm watch for Connecticut. The entire state is under the severe thunderstorm watch, according to the National Weather Service. The watch is in effect until 9 p.m., according to the National Weather Service.

The National Weather Service already has issued extreme heat warnings, watches and advisories across a swath of the Midwest and South.

The National Weather Service is using new heat alert terminology beginning this summer to improve public awareness and understanding of what the weather service says is the leading cause of weather-related deaths in the country,

EDT the National Weather Service released a heat advisory valid for Wednesday between 2 p.m. EDT and 8 p.m. EDT for Cass and Berrien counties.

A heat advisory was released by the National Weather Service on Monday at 12:23 a.m. valid between 10 a.m. and 6 p.m. for Geneva and Houston counties.