Air quality in the Tri-Cities has deteriorated due to wildfires.
By 5 p.m. Monday the air quality was rated "unhealthy for sensitive groups."
Infants, children, adults over 65 and pregnant women are advised to limit time spent outdoors, along with people with heart or lung disease, asthma, diabetes and stroke survivors.
Smoke from wildfires as far south as central California and smoke from Eastern Oregon wildfires is moving over the Tri-Cities, according to the National Weather Service.
The Benton Clean Air Agency rated air quality at 105 early Monday evening, using a national system set by the Environmental Protection Agency to match the Clean Air Act.
Ratings of 51 to 100 is considered "moderate," and the air quality in the Tri-Cities was rated in the upper end of the moderate range for most of Monday.
When the rating reaches 101 to 150 as it did Monday evening, it is considered "unhealthy for sensitive groups."