Canada wildfires are causing hazardous smoke to drift into the U.S., lowering air quality across multiple states. Residents are advised to take health precautions as fires rage on. The post Canada Wildfires Spread Smoke,

A gray haze from wildfire smoke could be seen in Cincinnati, and the entire state of Minnesota is under an air quality alert.

Smoke has made its way back into the northern tier of the U.S., prompting air quality alerts in North Dakota, Minnesota and Montana on Wednesday and Thursday.