CHICOPEE, Mass. (WWLP) – Western Massachusetts temperatures will reach into the 90s again Tuesday with heat index values over 100 degrees. When talking about heat and humidity, we use a term called ...

"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 ...

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 ...