The Air Quality Index (AQI) uses a color-coded scale to inform the public about air pollution levels and potential health risks. Michigan residents can check the AQI through various online resources, including the MiAir Quality Index Dashboard and AirNow.

Canadian wildfire smoke lingers over the Greater Lansing area on June 6. The entire Lower Peninsula is under an air quality advisory.

Milwaukee has the 2nd worst air quality in the U.S. on June 5, per NYT. An air quality advisory across the state has also been extended until June 6.

Michigan's air, which has been tainted for several days by wafting smoke from Canadian wildfires, is expected to improve over the weekend, state officials said. But don't breathe too deep a sigh of relief, experts warned: Conditions could decline again early next week.

Elevated ground level ozone layers will cause the air quality index in Connecticut to be "unhealthy for sensitive groups" once again on Thursday, as temperatures are expected to reach 90 degrees for the first time this year.

An air quality alert remains in effect for the entire Chicago area, with another "Air Pollution Action Day" alert declared as wildfire smoke from Canadian wildfires continues to impact parts of the Midwest.

Wildfire smoke has sparked the national weather agency to issue air quality warnings around the county of Grande Prairie and the northwestern corner of Alberta, and air quality statements for much of northern Alberta.

Another air quality alert has been issued for the NYC area today, and it has expanded to include Long Island and New Jersey.