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.

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.

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.

Air quality alerts are in place until 11pm ET several New York ... An additional round of heavy surface smoke from wildfires across southern Canada is expected to transport into northern Minnesota on Tuesday. In Illinois, the Air Pollution Action Day ...

Environment Canada is warning of poor air quality and extreme heat in Toronto on Monday as southern Ontario braces for a week filled with hot and humid weather.

The heat warning issued last Friday for the Ottawa-Gatineau region should last until Thursday night, according to Environment Canada. Special air quality statements also linger Tuesday in western Quebec.

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