Cyanotoxin Outbreak Due To Dry, Hot Summer Threatens Water Supply In Clear Lake, California

CLEARLAKE, CALIFORNIA - SEPTEMBER 26: Blooms of cyanobacteria, also called blue-green algae, cover the surface of the water in Clear Lake at Redbud Park on September 26, 2021 in Clearlake, California. Residents and visitors of Clear Lake, California's second-largest freshwater lake, are being urged to use caution when visiting the lake after officials discovered high levels of dangerous cyanotoxins from the algae. Nearly 300 residents draw water directly from the lake and are being told to avoid using, even with boiling as that will not kill the bacteria. (Photo by Justin Sullivan/Getty Images)