Poor air quality expected to linger 'the next few days' in the northern U.S.
Canadian wildfires: Chicago has the worst air quality in the world
Chicago air quality hits 'very unhealthy' category as Canadian wildfire smoke infiltrates Midwest - ABC News
Chicago's air quality ranks among worst in the world because of Canada wildfires
Wildfire Smoke Creating Poor Air Quality In Great Lakes | Weather.com
Canada wildfires break records and darken skies in the Midwest
Chicago experiences worst air quality in the world | WBEZ Chicago
Chicago and Midwest Air Quality Declines as Canada Wildfire Smoke Lingers - The New York Times
Heatwave in south and wildfire smoke in north buffet US from both sides | US news | The Guardian
Workers lack protections when wildfire smoke makes the air dangerous - Wisconsin Examiner
Video: See Chicago's skyline blanketed in wildfire smoke | CNN
Chicago's skyline blanketed in wildfire smoke - YouTube
Chicago air quality deemed 'unhealthy' as smoke from Canadian wildfires descends on area
Chicago has the worst air quality in the world due to Canadian wildfire smoke - CBS News
Smoke from Canadian wildfires prompt air quality alerts in Chicago, Detroit | AP News
Chicago, Detroit have some of the world's worst air quality due to Canadian wildfire smoke | Fox Weather
Canada Wildfire Smoke in NYC, Chicago, Philadelphia, DC: Photos
Wildfire smoke sends air quality to dangerous levels across the Midwest - video Dailymotion
Could the smoke being seen in NY come to Chicago area next? – NBC Chicago
Chicago air quality at unhealthy levels due to Canadian wildfires smoke; Alerts in effect in Illinois, Indiana, Wisconsin - ABC7 Chicago
New York smoke pictures show 'apocalyptic' scenes – NBC New York
Chicago air quality remains at unhealthy levels due to Canadian wildfires smoke; Alerts in effect in Illinois, Indiana, Wisconsin - ABC7 Chicago
Chicago Tops World's Most Polluted Cities As Canadian Wildfire Smoke Drifts Into Midwest
Chicago air quality hits 'very unhealthy' category as Canadian wildfire smoke infiltrates Midwest - ABC News
Unhealthy U.S. Air Quality as Wildfire Smoke Covers Chicago and Midwest Cities - The New York Times
Chicago air quality unhealthy as Canadian wildfire emissions reach record levels and send smoke to Europe | The Independent
Wildfire smoke live updates: Detroit, Chicago and the Midwest blanketed by haze from Canada | NPR
Over 122 million under air quality alerts from Chicago to DC as Canadian wildfire smoke pours into US | Fox Weather
