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.

The Michigan Air Quality Division said as smoke from Canadian wildfires continues to threaten the upper Midwest, "monitors in the western (Upper Peninsula) showed a large increase surface concentrations, during Tuesday, as smoke mixed down, which sent PM-2.5 concentrations soaring into the Unhealthy and higher range."