Nation Dead fish are piling up on San Francisco Bay Area shores. A toxic algae bloom is likely cause September 1, 2022 Wyatte Grantham-Philips, USA TODAY Comments Off on Dead fish are piling up on San Francisco Bay Area shores. A toxic algae bloom is likely cause A heatwave may worsen an unprecedented "red tide" in the San Francisco Bay Area. Thousands of dead fish and other sea life have already washed ashore.