At least twelve states have issued air quality alerts and advisories due to the ongoing Canadian wildfires sending smoke down to the Great Lakes region and the northeastern United States, the National Weather Service reported on 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,

Wildfires in Canada are leaving a trail of smoke across the northern United States and prompting local authorities to issue health warnings for millions of people because of poor air quality.