The Oregon Health Authority has issued a health advisory for recreational use at Cullaby Lake over blue-green algal blooms that can produce toxins.

People are urged to avoid activities such as swimming, water skiing or power boating near algal blooms.

“The county parks department has posted ‘Health Advisory in Effect’ signs for the waters of Cullaby Lake at the entrance to both Cullaby Lake Park and Carnahan Park,” Steve Meshke, Clatsop County parks natural resources manager, said in a statement.

The health authority said symptoms of exposure to cyanotoxins include diarrhea, cramps, vomiting, numbness, dizziness and fainting. The health authority said children and pets are particularly sensitive to illness from exposure.