The Brief Wildfire smoke from Washington, Oregon and Canada is expected to worsen air quality across western Washington through midweek. Health officials warn air quality could reach unhealthy levels, especially for children, older adults and people with heart or lung conditions. Residents are urged to monitor the Air Quality Index, limit outdoor activity when smoke is heavy and take steps to reduce indoor smoke exposure. There’s no safe amount of smoke exposure versus harmful amount of smoke exposure. Resources for residentsOfficials recommend residents:Check the Air Quality Index frequently through AirNow or local air quality agencies.