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

As of Tuesday morning, the Air Quality Index in Milwaukee was between 115 to 120, which falls in the "unhealthy for sensitive ...

Nine locations in Malaysia saw unhealthy air when measured using the Air Pollutant Index (API), said the Department of ...

Milwaukee, Ozaukee, Racine, Kenosha and Sheboygan counties are all under a poor air quality alert from noon to 11 p.m., ...

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

The City of Moose Jaw is once again under a special air quality statement from Environment and Climate Change Canada. Wildfire smoke is expected to drift into over the city and surrounding areas this ...

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

The National Weather Service reported an air quality alert at 12:53 p.m. on Wednesday in effect until Thursday at 10 a.m. for ...

The National Weather Service reported an air quality alert at 11:04 a.m. on Wednesday in effect until Thursday at 3 p.m. for ...

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

An air quality alert was issued by the National Weather Service in Milwaukee-Sullivan at 9:26 a.m. on Wednesday, July 16.

The National Weather Service reported an air quality alert at 12:35 p.m. EDT on Monday in effect until Wednesday at midnight ...