LAS VEGAS — Extreme heat has already taken a deadly toll in the United States this summer, even as some of the hottest weeks are still to come. The Northern Hemisphere is approaching the midway ...

Extreme heat is the deadliest weather hazard in the U.S. It becomes exceptionally dangerous when temperatures don't drop overnight, providing little or no relief to the hot weather during the day.

A massive heat dome is impacting the United States from Chicago to New Orleans, placing nearly 100 million people under extreme heat alerts. This weather phenomenon, characterized by a large ridge ...

A heat dome is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service issuing heat alerts from Nebraska to Florida.

Millions of Americans are experiencing severe weather conditions this week as heavy rainfall, extreme heat and thunderstorms are forecast across the U.S., with life-threatening conditions possible ...

An extreme heat warning remains in effect from 10 a.m. until 8 p.m. on Wednesday, July 23 for portions of Northeast and Southeast Louisiana, as dangerously hot conditions with heat index values ...