Canadian wildfire smoke chokes Minneapolis with worst air quality in America on Monday

Canada's wildfire season has erupted as dozens of blazes burn in the country's western provinces, and smoke from those fires is choking the skies over the Upper Midwest early this week.

The Twin Cities of Minneapolis-St. Paul in Minnesota claimed the worst air quality in America on Monday after winds carried the smoke southeastward into the northern U.S.

Hazy skies were first seen Sunday over parts of northern Minnesota before spreading farther south into the Twin Cities overnight.

The air quality index (AQI) in Minneapolis reached the "unhealthy" category Sunday night and has remained there through Monday.