- Minnesota under statewide Air Quality Alert for second day in a row kare11.com
- ‘Hazardous’ air quality alert dropped in NW Minnesota as cleaner air moves into state Star Tribune
- Smoke From Canadian Wildfires Blankets the Upper Midwest The New York Times
- Millions in U.S. warned to stay indoors, keep windows closed. Could Pa. be next? PennLive.com
- Maps show U.S. air quality and Canada wildfire smoke forecast CBS News