A push of cooler marine air arriving Thursday night and Friday will help clear surface-level smoke, improving overall air quality heading into the weekend. Relief is in sight from the smoky conditions in Western Washington, but Thursday will remain hot and hazy. Wildfire smoke remains trapped over Western Washington and will continue to be part of the forecast through Thursday. (FOX 13 Seattle)A heat advisory remains in effect through Thursday evening for much of Western Washington. Smoke & air quality in Western WashingtonSmoke will remain one of the biggest weather stories through Thursday.