Most of us check the temperature every morning before we head outside, but there’s another number on your weather app that’s just as important: the UV Index. The UV Index tells us how strong the sun’s ...

Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as "unhealthy" ...

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 ...

NEW YORK (WABC) -- The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, and what health effects might be of concern. The AQI focuses on what you might ...

The heat index measures how hot it really feels outside. The heat index is calculated based on air temperature and relative humidity. The National Weather Service will issue alerts when the heat index ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. DENVER (KDVR) — If you’ve ever thought the ...

SIOUX FALLS, S.D. (KELO) — With summer right around the corner, we’ll be keeping an eye on the skies for more reasons than one. Meteorologist Adam Rutt explains. The last couple of days in KELOLAND ...

"It's not the heat. It's the humidity." Sound familiar? I think we're all guilty of saying that at some point between June and September. The heat index isn't just some made-up number to inflate ...