Algae bloom prompts warning at Clear Lake

Lake County's health department has issued a warning for swimmers and their pets to avoid the waters around the city of Clearlake.

A blue-green algae bloom of the same type — Lyngbya — that caused a stink around the lake last year is the culprit, authorities said.

No toxins have been found in the water, but Lyngbya can release substances that cause skin irritations.

Lyngbya blooms are common in Clear Lake. But last year's bloom was the worst in 20 years. The rotting algae emitted a cow manure-like stench that kept tourists at bay and forced south lake residents to keep their windows shut.

Earlier this year, the lake also was suffering from an invasive pond weed, which can get tangled in boat motors.

Health officials said people and their pets should avoid wading or drinking the water near the algae blooms, which have appeared at Austin Park, Highlands Park and Redbud Park. Most of the rest of the lake is safe, officials said.