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 ...

For the third day in a row, an Air Quality Health Advisory has been issued for Niagara County and the rest of Western New York through midnight due to the impact of smoke from wildfires in Canada.

For the first time since Saturday, state officials haven’t issued an air quality health alert as the smoke from Canadian wildfires should be subsiding. Winds from the south are expected to flow into ...

A touch of wildfire smoke is expected to drift over the Washington, D.C., region Thursday, bringing a slight haze but no major air quality concerns.