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 ...

"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 ...

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 ...

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 ...

If you are living in one of many areas of the U.S. currently experiencing a heat wave, your outdoor thermometer may say it's in the 90s, but your local weather station tells you it feels like triple ...

Heat advisories have been issued for various parts of Florida, urging residents to take precautions. Dangerous heat is expected on Florida's Treasure Coast, with predicted heat index values from 109 ...

With an early summer heat wave baking Michigan and the Midwest, residents may notice two temperatures provided with daily forecasts: actual and apparent — or "feels like" — temperatures based on the ...

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 ...

Conditions are hot and humid in Michigan and getting hotter as the week goes on. Forecasters often refer to the heat index as a way to measure the "feels like" temperature. Here's a look at what that ...