Only one Kansas lake remains under a warning for high levels of blue-green algae.

The Department of Health and Environment said Thursday a warning was in place for Memorial Park Lake in Great Bend. The warning means direct contact with the water through swimming, skiing and wading should be avoided.

The agency also said advisories remain in place for Augusta City Lake, Harvey County East and West lakes and Logan City Lake. A warning for Warnock Lake in Atchison County has been downgraded to an advisory.

An advisory signifies boating and fishing may be safe, but direct contact by people and pets is strongly discouraged.

Blue-green algae become a problem when they bloom in massive amounts and release toxins that may cause rashes, vomiting, nausea and other symptoms.