A daily mismatch between temperature and humidity, observed in certain mountain and waterside regions, helps regulate ...

Temperatures will surge well into the 90s across the Northeast and Mid-Atlantic early next week as another wave of hot and ...

What is heat stroke? The signs and symptoms to look for during a heatwave - A public health expert has revealed some of the ...

Summer is just getting started, and millions of people are under heat advisories as a major heat wave spreads across the eastern U.S.

Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

Basically, when the body sweats, the perspiration evaporates, cooling the body. When the humidity is high, the sweat doesn't ...

The heat index, or apparent temperature, combines air temperature and relative humidity to indicate how hot it feels. High humidity slows sweating, the body's natural cooling system, making ...

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know ...

National Weather Service observations at Lehigh Valley International Airport show the heat index entered the triple digits Monday morning. What’s that mean? Well, it’s hot, of course — as anyone can ...

In the U.S., hundreds of people working or playing outside – even those who seem healthy – succumb to heat-related illnesses each year. Older adults and people in areas that historically haven’t ...