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Canadian wildfire smoke triggers unhealthy to hazardous air quality alerts
Air quality alerts were reported across more than a dozen states, with AirNow.gov flagging conditions from unhealthy to hazardous in multiple regions and major cities expected to be affected.
Wildfire smoke from Canadian fires blanketed parts of the northeastern United States on July 16, prompting air quality alerts across more than a dozen states, according to USA Today. AccuWeather forecast that the smoke effects would intensify through the day as risk managers assessed operational exposures tied to recurring summer air quality hazards.
AirNow.gov recorded unhealthy to hazardous air quality across parts of Minnesota, Wisconsin, Michigan, northern Illinois, northern Ohio, New York, eastern Pennsylvania, New Jersey, and Delaware. Major cities including Philadelphia, Cleveland, Chicago, Detroit, and Washington, DC were among those expected to be affected, AccuWeather reported.
The Canadian Wildland Fire Information System recorded more than 850 wildfires across Canada at the time of reporting. In northern Minnesota, more than a dozen fires from an early July lightning storm had burned about 55,000 acres around the Boundary Waters Canoe Area Wilderness, confirmed Sarah Strommen, commissioner of the Minnesota Department of Natural Resources, according to USA Today.
The situation has implications for commercial risk across property and other coverage. Insurance Business cited Verisk data showing smoke damage accounted for about 30% of claims filed within the first 30 days of the 2025 Los Angeles wildfires, and that an additional 35% of smoke-related claims arrived two years later, reflecting a long tail of air quality losses. The article also notes that California, Oregon, and Washington have outdoor-employer rules tied to PM2.5 thresholds, while the affected northeastern and Great Lakes states do not, leaving employers to rely on the federal OSHA general duty clause during sustained air quality emergencies.