- Chicago and Midwest Air Quality Declines as Canada Wildfire Smoke LingersThe New York Times
- Midwest air quality plummets as Canada wildfire smoke moves inYahoo News
- Chicago Skyline Obscured By Thick Smoke | Weather.comThe Weather Channel
- Chicago air quality worst in the world todayCrain’s Chicago Business
- Wildfire smoke returns: ‘Code Orange’ air quality for DC area WednesdayWTOP
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