Heat index is the combination of humidity and air temperature. It's a metric that measures how hot it feels.

As Pittsburgh's temperatures climb toward triple digits, these are the key heat-related weather terms you should know.

Meteorologist Joe Puma warns that high humidity levels will significantly increase the heat index, making temperatures feel ...

The heat index is a measurement that considers both air temperature and humidity to determine how hot it actually feels to the human body.

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 ...

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 ...

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 ...

WICHITA, Kan. (KAKE) — When you hear the term “heat index” in the forecast, it’s usually paired with a much higher number than the actual temperature. For example, you might hear us say “It’s 94 ...