Although it is recommended to hunker inside during these stretches, experts say indoor air quality can often be just as bad, if not worse, than outdoor air quality.

There is an air quality alert for all counties in Michigan until midnight Friday, the Michigan Department of Environment, Great Lakes and Energy reported. Pollutants across the state are expected to be in the Unhealthy for Sensitive Groups (USG, Orange AQI) range Wednesday and Thursday, with some locations reaching the Unhealthy (Red AQI) range.

Canadian wildfires in Manitoba and Saskatchewan have prompted air quality alerts in Minnesota, Wisconsin and Michigan on Wednesday and Thursday as residents are advised to "limit prolonged or heavy exertion.