Extreme heat indexes are expected across parts of nine states on Thursday.

Two of the biggest risks in extreme heat are heat exhaustion and heat stroke. Both can come on fast, and in some cases, become dangerous if left untreated.

A heat advisory and extreme heat warning will be in effect as hot and humid conditions hit Delaware on July 25. See the weather forecast.

A heat advisory and extreme heat warning are in effect for portions of the tri-state area. The high temperature will be 96 in the city, mid to upper-80s for coastal sections and mid to upper-90s ...

But what exactly makes heat worthy of a weather alert? The criteria change based on the region, but here’s what to keep your eyes peeled for in North Texas.

This week ends with weather alerts for heat in the Philadelphia region after a nice mid-July break.

OMAHA, Neb. (WOWT) - It’s a First Alert 6 Weather Day as the heat wave arrives today. Today through Tuesday are First Alert 6 Weather Days due to the dangerous heat.

Dangerous heat and humidity continue to grip the Midstate through next week.

As an extreme heat wave threatens more than 200 million people in the U.S., a tropical system lingering in the Gulf could bring some relief during the hottest days of the year.

On Thursday at 12:36 p.m. an updated extreme heat warning was issued by the National Weather Service valid for Friday between 10 a.m. and 9 p.m. for Bucks County.

An updated extreme heat warning was released by the National Weather Service on Thursday at 12:36 p.m. valid for Friday between 10 a.m. and 9 p.m. for Eastern Montgomery and Lower Bucks as well as ...