OVERLAND PARK, Kan. (AP) — Kansas health officials have issued an advisory about blue-green algae at a Johnson County lake. WDAF-TV reports that the Kansas Department of Health and Environment has posted advisory signs at South Lake Park in Overland Park warning people about the dangers of the algae. The department says people and pets should not drink the water at the lake. Ingesting the infected water can cause diarrhea, vomiting and animals can die from drinking too much water affected by the blooms. Blooms of blue-green algae sickened more than a dozen people in Kansas last year and killed at least five dogs.