The Western US has the worst air quality in the world, group says
By Paul P. Murphy
Are my symptoms related to COVID-19, or the wildfire smoke?
By Michelle Ghoussoub
Yes, the Bay Area just suffered some of its worst-ever air quality days: Charts show how bad
By Kellie Hwang
Portland's air quality is off the charts Sunday, and parts of Oregon are just as bad due to wildfires
By Aimee Green