Smoke from wildfires blazing across Canada is once again wafting over huge portions of the Midwest and worsening air quality, with conditions particularly bad on August 1 in Minnesota, Iowa and Illinois.

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

Air quality alerts remain in effect through this evening as wildfire smoke from Canada continues to settle across the area. While there may be some improvement near the surface this afternoon, it will still appear hazy for much of the day.