Seattle, Portland have world’s worst air quality again Thursday. When is rain expected?  KOMO NewsAir quality in Seattle ranked as one of the worst in the world | FOX 13 Seattle  FOX 13 SeattleThis October smoke could be the latest on record  KXLY SpokaneSeattle air quality among worst in world  The Seattle TimesWestern Washington smoke: Unhealthy to hazardous air hangs over region  KIRO SeattleView Full Coverage on Google News