Air quality alerts were in effect in Iowa, Minnesota, Wisconsin and Michigan, as well as eastern Nebraska and parts of ...

Smoke and grit from hundreds of forest fires have spread across large parts of Canada and the northern US, sending air quality across the Midwest and northeast US and Toronto to unhealthy levels.

Air quality alerts had been issued for nine states as of Sunday morning, with residents in some areas advised to combine errands in order to help reduce pollution levels.

Canadian wildfire smoke returns to New Hampshire on Sunday, reducing air quality on an otherwise sunny and comfortably warm day. >> Download the free WMUR app to get updates on the go: Apple | Google ...