Grays Harbor County officials on Tuesday warned of a blue-green algae bloom at Vance Creek County Park south of Elma.
Cyanobacteria, or blue-green algae, blooms when the temperature, sunlight and nutrient conditions are right. Some blue-green algae cause toxic blooms that can cause serious illness in people or be fatal to pets, birds and other animal, according to the Washington State Department of Health.
The Grays Harbor County Environmental Health Division confirmed the cyanobacteria bloom in Pond No. 2 on Monday at Vance Creek park.