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

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

The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

Canadian wildfire smoke lingers in Michigan. Officials issued an air quality advisory in southeast Michigan for July 15.

Officials warn southeast Michigan residents to be careful outdoors Tuesday because of expected high ozone pollution levels.

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

Unhealthy air has invaded Minnesota, Wisconsin and North Dakota early this week as a new round of wildfire smoke from Canada ...

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

Additional plumes of smoke from Canada's active wildfires prompt officials to issue a statewide air quality alert on July 14.

A statewide air quality alert remains in effect Monday as smoke from Canadian wildfires continues to move across Michigan.

The Canadian wildfires are expected to track east and south, expanding in Michigan as Sunday goes on and additional smoke is ...

The Michigan Department of Environment, Great Lakes, and Energy expects particle pollution to reach the Unhealthy for ...