Knowing the difference between heat exhaustion and heat stroke could be the key to saving someone’s life. Here’s what you should watch for.

As mercury hits sweltering 46C in places, people urged to stay indoors, stay cool and hydrated, protect young children and ...

Nearly half the U.S. will wilt under hot, sticky conditions through the bulk of the week as temperatures and humidity soar ...

A heat advisory is in effect July 28 and an extreme heat watch is set for July 29, according to the National Weather Service.

July will make a potentially record-breaking exit this week as a heat dome will create triple-digit feels-like temperatures ...

Jacksonville, North, Northeast Florida: Dangerous heat today, with heat index of 108 to 115. Extreme heat warning and heat ...

The blistering heat and high humidity will continue into this week in Illinois, with heat advisories issued throughout the ...

Forecasters in the Nashville office of the National Weather Service are attempting to relay warnings about the expected ...

A heat advisory has been issued for the Lower Hudson Valley on Monday, July 28, as heat index levels are predicted to reach ...

Major cities under heat alerts Monday include Dallas, Oklahoma City, St. Louis, Chicago, Memphis, Atlanta, Tampa, Charleston, New York, Philadelphia and Boston.

The National Weather Service in San Juan, Puerto Rico, has issued heat warnings and advisories for Puerto Rico and the U.S.

About half the country is under active heat advisories on Monday, affecting more than 198 million Americans, according to the National Weather Service . The extreme heat is expected in the Midwest, ...