Smoke from wildfires is expected to cause poor air quality and reduced visibility, according to an alert issued by Environment Canada on Thursday.

Smoke from wildfires burning in northern Ontario and the Prairies of Canada caused poor air quality and reduced visibility in major cities including Toronto, Ottawa and Montreal on Friday.

According to the Ontario’s Air Quality Health Index (AQHI), areas that had “high risk” ratings on Friday were Belleville, Brampton, Brantford, Burlington, Cornwall, Grand Bend, Guelph, Hamilton, Kingston,