Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

Smoke from the Canadian Wildfire has caused an unhealthy air quality index rating in the Peoria area, and medical professionals are urging people at high risk to stay inside and filter the air in their homes.

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.