1. Wildfire smoke will worsen in the Northeast and Mid-Atlantic through Friday  The Washington Post
2. Chicago Air Quality Alert: Chicago ranks as worst air quality for major cities worldwide, wildfire smoke impacts outdoor events  ABC7 Chicago
3. Heavy smoke from wildfires is darkening skies from the US Midwest to the East Coast, in photos  The Seattle Times
4. Wildfire Smokes Makes Air Hazardous for Millions in Midwest and East Coast  The New York Times
5. Beaches, outdoor pools closed; events canceled, postponed due to poor air  WGN-TV

Source: Google Finance – Market News