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 accordingly in Michigan.

In Canada, the Air Quality Health Index (AQHI) is a scale developed to help people understand what the current air quality means for your health. It is an initiative among Environment Canada, Health Canada and the provincial governments.

The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

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.

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!