The smoky scene calls to mind the record-shattering Canadian wildfire summer of 2023, with smoke that choked Michigan and much of the U.S. for days at a time. Researchers say wildfire smoke is becoming a more regular part of Michigan summers.

Smoke from Canadian wildfires is engulfing much of the eastern and central United States and and is expected to continue for days.

By Erica Dischino, Patrick Wingrove and Amanda Stephenson DULUTH, Minnesota (Reuters) -Smoke from wildfires burning in three Canadian provinces is spreading into the U.S. Upper Midwest, stirring memories of the severe pollution that drifted south from Canada two years ago during that country's worst fire season on record.