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

From rain to heat, Florida's weather continues to swing from one extreme to the next. After much of the week was spent tracking whether Invest 93L would move across the state into the Gulf and affect ...

WASHINGTON — As the first heat wave of the season takes hold, people might be hearing a lot about "feels-like" temperatures. For example, WUSA9 meteorologists say at 4 p.m. Monday, the temperature ...

"It's not the heat, it's the humidity." Actually, it's both, and that's where the National Weather Service's heat index comes in. Also known as the apparent temperature, the heat index is a number ...

Temperatures this week are some of the hottest we have seen the entire year now as we get to the end of July. This is a perfect opportunity to explain what the Heat Index is and how it is all ...

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 ...

What does the "heat index" mean and how does it apply to people? -- S.S., Tulsa. The World Almanac and Book of Facts, updated annually, always includes the heat index ...

The official start of summer is on the horizon and it's bringing dangerous heat with it. With New Jersey expected to have a hot summer, it's good to know how to prepare for the weather. According to ...

Extreme heat warnings, extreme heat watches and heat advisories are in effect across most of Florida. Some areas could see a heat index up to 115 degrees. See what you should do - or not do - during ...

CLEVELAND, Ohio — Northeast Ohio residents are in for a steamy and potentially stormy weekend, as the National Weather Service in Cleveland warns of strong to severe thunderstorms and dangerously high ...

The heat index is a measure of how hot it really feels on your body when relative humidity is factored in with the actual air temperature. Since heat index values were devised for shady, light wind ...