- More Canadian wildfire smoke shrouds US midwest, mid-Atlantic and north-east The Guardian
- Wildfire smoke will linger and spread this weekend. See which cities are most affected. The Washington Post
- Before and after images: Wildfire smoke casts skylines in dystopian haze CNN
- Philadelphia Under Code Purple Air Quality Alert for Particulate Matter City of Philadelphia (.gov)
- Live updates: Wildfires in Minnesota MPR News
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More Canadian wildfire smoke shrouds US midwest, mid-Atlantic and north-east – The Guardian
