Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday. Canadian wildfires burning across northern Manitoba and Saskatchewan are sending smoke through central Canada, the Great Lakes region and the northeastern United States, reducing air quality and visibility in major cities.

On Monday morning, Environment Canada issued a special air quality statement for the vast majority of southern Ontario, predicting "poor air quality" as a result of forest fires.

An air quality statement is in effect for Toronto and the surrounding region as wildfire smoke continues to drift south, Environment Canada says.