Parts of western Washington experience unhealthy and hazardous air quality after Fourth of July

Western Washington has had unhealthy to hazardous air quality one day after 4th of July celebrations

Tips to prepare your home during air quality concerns

Air quality improving in western Washington after being unhealthy a day after 4th of July

NYC AIR QUALITY: Canadian wildfire smoke creates thick haze across New York City

Parts of Oregon suffer through unhealthy or hazardous air quality due to wildfire smoke

Smoke from the Cedar Creek Fire is polluting air across western Oregon

Air quality in San Diego County may be affected as fires blaze across Los Angeles

Hazardous air quality conditions in New York

Hazardous smoke from wildfires hangs over millions in Canada, US

Hazardous smoke from wildfires hangs over millions in Canada, US

Scientists measure hazardous air pollutants as people in Childs Park are concerned about the smell

Chemists test air quality in Childs Park after strange smell circulates

Air quality worsens in eastern US as Canadian wildfire smoke hangs over Midwest

Columbus Fire: Time-lapse video shows large auto scrapyard fire

Columbus scrapyard fire: Crews continue to battle flames

Columbus fire crews working to contain massive blaze at auto scrapyard

Columbus Fire: Drone video shows large plumes of smoke over the city

Smoke, haze cover New York City — expected to linger for next few days

Study: U.S. Air Quality Index could be less effective in protecting kids against wildfire smoke