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

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

EDT the National Weather Service reported an air quality alert in effect until Thursday at 1:30 a.m. EDT for Cass and Berrien counties.

The National Weather Service has issued both a heat and air quality alert for most of downstate New York, Wednesday, July 16.

An Air Quality Alert has been issued for parts of northern New York and Vermont today because of Canadian wildfire smoke.

The Minnesota Pollution Control Agency has issued a statewide air quality alert through 9 a.m. Monday because of Canadian wildfire smoke.

Unhealthy air quality is forecast, with periods of Very Unhealthy air quality possible for several hours. Folks should expect to see and smell smoke, and Air Quality Alerts are in effect. Conditions will improve slightly tonight through Sunday.