Another air quality alert is in effect for Philly and its neighboring Pennsylvania counties Sunday, and it looks like more ...

An air quality alert was issued for parts of Southern California because of the effects of the Canyon Fire, fueled by dry ...

Weather across Colorado competed for most dramatic forecast on Saturday as red flag conditions challenged firefighters on the ...

The National Weather Service in Boulder has issued an air quality alert for Rio Blanco, Eagle, Summit, Garfield, Pitkin, ...

Vulnerable groups are urged to avoid outdoor activity in multiple parts of southern California due to air pollution.

The National Weather Service said the alert will be in effect until Sunday morning in the Santa Clarita Valley and Saturday ...

Wildfire smoke doesn’t just cloud the horizon, it can chemically change the air at ground level and in layers of the atmosphere miles above.

Wildfire smoke doesn’t just cloud the horizon, it can chemically change the air at ground level and in layers of the ...