(KDVR) — Wildfires in Canada have caused poor air quality and smoky skies across several U.S. metros for days. On Wednesday, the air quality in New York City was ranked the worst in the world. That’s ...

HOUSTON – If you live in the Houston area, you might have noticed that air quality alerts are issued throughout the year by the U.S. Air Quality Index (AQI). The AQI is divided into six categories, ...

Canadian wildfire smoke is affecting air quality in parts of Michigan. The EPA's air quality index (AQI) uses a color-coded scale to inform the public about air quality and associated health risks.

As wildfires become more frequent and intense, many communities are feeling the effects of poor air quality—even hundreds of miles from the flames. Wildfire smoke contains a mix of gases and fine ...