Smoke from nearly 800 wildfires burning in the western provinces and northern Ontario has prompted Environment Canada to issue numerous special air quality statements.
Periods of poor air quality and reduced visibility can be expected for a few days until winds push the smoke out of the region.
Health officials are telling residents to avoid exposure to smoke as much as possible especially pregnant women, infants, seniors and those with lung diseases.
A relatively quiet fire season in the Maritimes has allowed firefighters from New Brunswick, Nova Scotia and Prince Edward Island to lend a helping hand in the West.