All of Minnesota will experience poor air quality this weekend as smoke — both near the surface and at higher altitudes — invades from wildfires that are burning out of control in Canada. Minnesotans will be able to see and smell the smoke when it nears the surface.

The Canadian province of Manitoba has declared a state of emergency over a series of wildfires and heavy smoke from those fires could move into the Chicago area beginning Friday afternoon.

Smoke from wildfires in Canada has begun drifting across the border into the United States, raising concerns on Friday about possible health hazards in the Upper Midwest, the authorities said.