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

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.

The Iowa Department of Natural Resources reported Friday that air quality in Iowa will be at levels “unhealthy for sensitive groups” through Saturday, due to smoke from wildfires in Canada. The National Ambient Air Quality Standards advise that fine particulate matter should not exceed averages of 35 micrograms per cubic meter in a 24-hour period.