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Maps show Canada wildfire smoke forecast for U.S. as dozens of blazes burn out of control

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More than 90 fires out of 174 are burning "out of control" across Canada .

Air quality alerts are covering parts of the Upper Midwest , including Michigan 's Upper Peninsula and northern Minnesota .

Drought and record heat contributed to the blazes, which in May and June created a record level of emissions.

Maps and satellite imagery show the large-scale impact of the smoke.