Wildfire smoke degrades air quality in swaths of Ontario, with Toronto ranking among the worst in the world on Monday.

The Minnesota Pollution Control Agency has issued an air quality alert for northwest, north-central, and northeast Minnesota ...

At 9:57 a.m. on Monday, the National Weather Service reported an air quality alert in effect until 10 p.m. for Oneida, Seneca ...

On Monday at 10:07 a.m. an air quality alert was reported by the National Weather Service in effect until Tuesday at midnight ...

The alert comes as humidity is expected to increase Tuesday, with high temperatures in the mid 80s to low 90s, with heat ...

The Minnesota Pollution Control Agency has issued varied air quality alerts across Northern Minnesota for the upcoming ...

An air quality alert has been issued for all of Michigan for Sunday and Monday due to smoke from Canadian wildfires.

EDT on Tuesday, the National Weather Service reported an air quality alert in effect until Thursday at midnight EDT for ...

An Air Quality Alert will be in effect through midnight Tuesday for Southeast Michigan, the state's Department of Environment ...