It'll be a scorcher in southern Colorado today as the mercury climbs to the upper 90s to triple digits with heat indexes in the 90s for most. Heat Advisories and Red Flag warnings are both in effect.

A group of Republican state lawmakers from Midwestern states filed a complaint over smoke from Canadian wildfires. Republican state Reps. Austin Harris of Iowa, Elliott Engen of Minnesota, Calvin ...

The Canadian wildfire smoke is continuing to drift into the Mid-Atlantic region, which is impacting air quality statewide.

L.A.’s fires have reshaped the city. It is also possible that they have triggered changes in our very cells whose ...

Millions of Americans have been urged to avoid driving amid concerns over high air pollution levels. Air quality alerts were issued across parts of Illinois, Colorado, Wyoming, and Arizona on Thursday ...