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Detroit Ranks as 3rd Worst City Worldwide for Air Quality Amid Wildfire Smoke

CANADA, AUG 4 – Nearly 4,000 wildfires in Canada have caused air quality alerts across eight U.S. states, with Detroit and Chicago ranking among the most polluted cities, officials said.

  • Amid persistent smoke from Canadian wildfires, the Minnesota Pollution Control Agency extended its statewide air quality alert until noon on Monday, August 4th.
  • Canada is experiencing its second worst wildfire season, with over 700 active fires mostly in Manitoba, according to the Canadian Interagency Forest Fire Centre on Sunday.
  • With steady smoke drift, sensors recorded elevated pollution levels, as AQI reached about 160, indicating unhealthy conditions and IQAir ranked Detroit, Chicago and Minneapolis among the worst U.S. cities for air quality on Sunday afternoon.
  • Across the region, health departments urged residents to limit outdoor activity and keep windows closed as of Monday morning.
  • AccuWeather forecasts steady northwest winds will keep smoke drifting into the U.S. with little relief expected, and scientists investigate whether the Atlantic-crossed smoke accelerates Arctic ice melt and rising temperatures.
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thepublicsradio.org broke the news in on Sunday, August 3, 2025.
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