Wildfire smoke has sparked the national weather agency to issue air quality warnings around the county of Grande Prairie and the northwestern corner of Alberta, and air quality statements for much of northern Alberta.

Smoke from wildfires in northern Alberta and northeastern B.C. was expected to reach Calgary this weekend, with forecasters warning of worsening air quality in the city. An evacuation order for parts of the County of Grande Prairie was expanded again late Friday,

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