Smoke from ongoing wildfires across Canada continued to drift into parts of the United States on Wednesday, causing hazy skies and triggering air quality alerts in multiple states across the upper Midwest and Northeast.

Hundreds of wildfires still burning in Canada are expected to undermine air quality across the Upper Midwest and Northeast into Tuesday.

Wildfires burning in Canada were causing unhealthy air quality across parts of North America on Monday. By Judson Jones Judson Jones is a meteorologist and reporter for The Times. Canadian wildfires burning across northern Manitoba and Saskatchewan are sending smoke through central Canada,