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Story summary
- Anderson Economic Group study found wildfire smoke from Canada and northern Minnesota caused at least $4 billion in Michigan losses.
- The losses stemmed from park closures, reduced outdoor-business traffic, and six days of Metro Detroit air-quality alerts from July 15-20.
- Dozens of outdoor events, camps and summer-school programs were canceled or postponed.
- Richard Melstrom said early data show reduced activity at parks, outdoor businesses and health clubs.
