CHICAGO (WLS) -- The Chicago area was under an air quality alert Wednesday due to the Canadian wildfire smoke. Environmental officials said the pollutants from the smoke will be sticking around the ...

Smoke from Canadian wildfires began to worsen air quality in the eastern U.S. on Wednesday as several Midwestern states ...

Iowans — especially those with heart and lung disease — should avoid long or intense activities and take extra breaks during strenuous activity outdoors in areas where air quality is rated unhealthy.

Parts of central Pennsylvania are under a code orange air quality alert, but the Midwest is seeing bigger air quality ...

Smoke from Canadian wildfires has carried another day of poor air quality south of the border to the American Midwest ...

A portion of eastern and northeast Iowa has "unhealthy" air quality Wednesday, according to the Environmental Protection Agency.

-Detroit's air quality is unhealthy for sensitive groups Wednesday as Canadian wildfire smoke spreads as far as Europe.

For many years the U.S. stalled and stalled about cleaning up serious air pollution in places like Pittsburgh, Detroit and ...