Smoke from the more than 700 wildfires burning in Canada is continuing to blanket parts of the Midwest for a final day.

Smoke from numerous Canadian wildfires is again impacting the Philadelphia region this week, with environmental authorities issuing code orange air quality alerts largely in effect through Tuesday as a result of the blazes’ aftermath settling in on the area.

The smoke is expected to remain over the northern and central Plains of the United States for the next couple of days, according to meteorologists.