An air stagnation advisory for the Tri-Cities and much of the Mid-Columbia has been extended through 10 a.m. Tuesday as a strong temperature inversion continues to trap pollution near the ground.
The National Weather Service had set it to expire Thursday morning.
Air quality in the Tri-Cities had improved Thursday to a rating of “good,” but it could deteriorate again in the next few days.
State air quality agencies recommend no outdoor burning and that wood not be burned in fireplaces or stoves, if possible.
Morning and evening fog is expected to persist through at least the next five days in the Tri-Cities. Highs should continue to be in the mid 30s and lows in the 20s most nights.