Milwaukee, Ozaukee, Racine, Kenosha and Sheboygan are all under a poor air quality alert from noon to 11 p.m., according to the National Weather Service. The air quality index is expected to reach the "unhealthy for sensitive groups" to even the generally "unhealthy" level throughout the afternoon and evening, NWS says.

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy levels due to smoke from Canadian wildfires.

With various air quality indexes available, and as wildfire smoke becomes an increasing health risk, here’s what often goes into the decision to play sports or not — and how to make sense of air quality indexes when making your own decision.

An air quality alert was issued by the National Weather Service in Green Bay at 11:55 a.m. on Tuesday, July 15.

Canada had some of the worst air quality in North America on Tuesday morning according to waqi.info, the website for the World Air Quality Index project. See how your community ranks.

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

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Buffalo, Clark, Crawford, Grant, Jackson, Juneau, La Crosse, Mo

After Syracuse's first heat wave (on Friday, Saturday and Sunday) in a year, we will be close to another heat wave this week!