Add Yahoo as a preferred source to see more of our stories on Google. "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.

Hot and humid for most of the work week with an afternoon heat index to the triple digits. A cold front brings rain and storms, plus some relief to end the week. Highs will reach the low 90s this ...

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 ...

Another steamy day with the heat index value expected between 99-102 Tuesday.A heat advisory is in place through 8 a.m. WednesdayThere will be far fewer downpours (most towns stay dry) Tuesday, ...

ANGELES. WELL, WE ALL KNOW HOW HOT IT GETS HERE DURING THE SUMMER IN SOUTH FLORIDA, BUT IT ACTUALLY FEELS MUCH HOTTER WHEN YOU FACTOR IN THE HUMIDITY. FIRST WARNING METEOROLOGIST BROOKE SILVERING ...

AND CONDITIONS ARE GOING TO BE WARM FOR A COUPLE MORE DAYS. BUT WE DO HAVE SOME RELIEF IN SIGHT MOVING FORWARD. OFFICIALLY AT PTI AIRPORT, WE HAD 93 DEGREES YESTERDAY, NOT THE HOTTEST DAY IN THIS ...

A warming trend moving into Michigan could last into next week and bring high heat indexes to the southeast portion of the state, the National Weather Service said. "Increasing heat and humidity ...

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 ...