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Unhealthy air quality in Portland and Vancouver
‘Unhealthy’ air quality in Portland, Vancouver metro areas due to wildfire smoke
Smoke-fog is upon us: ‘Unhealthy’ air quality and fog combine in Portland
Portland's air quality rated 4th worst in the world
Vancouver Smoke: Canada Issues Air Quality Advisory Due to Fires
Portland's Air Quality Drops to the Worst in the World
Hazardous air quality puts everyone at risk, experts say
Air quality advisory issued for Portland area due to smoke, ozone
Portland under air quality advisory from local, Canada wildfire smoke
Air quality advisory in effect for Portland-Vancouver area
Portland air quality among world's worst
Most of Oregon is under an air quality advisory because of wildfire smoke