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

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

On Saturday at 3:45 p.m. an air quality alert was reported by the National Weather Service in effect until Monday at midnight ...

According to the National Weather Service, the alert is now in effect for multiple north central West Virginia counties, ...

According to the National Weather Service, the air quality alert remains in effect through midnight in parts of the Chicago ...

On Tuesday at 12:37 p.m. EDT the National Weather Service reported an updated air quality alert in effect until Thursday at ...

Concern for poor air quality in the greater Chicago area remains as the Illinois EPA extends its alert until Thursday night.

An updated air quality alert was reported by the National Weather Service on Monday at 3:45 p.m. in effect until Tuesday at ...

An updated air quality alert was reported by the National Weather Service on Tuesday at 4:52 p.m. in effect until Thursday at ...

On Monday at 12:50 p.m. EDT an air quality alert was reported by the National Weather Service in effect until Wednesday at ...