The conditions are expected to cause poor air quality and reduced visibility across the region, according to a statement issued Thursday by Environment Canada.

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.

A stretch of southern Ontario remains under a special air quality statement today amid smoke from wildfires burning in parts of the country. Environment Canada says smoke from forest fires can cause reduced air quality and visibility that can fluctuate throughout the day.