The Los Angeles County Department of Public Health issued water quality warnings for seven local beaches on Wednesday after water samples revealed elevated bacteria levels exceeding state standards amid an intensifying summer heatwave.
Health officials warned that entering the contaminated waters could increase the risk of human illness.
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The current advisories impact specific coastal zones, including 100 yards around the storm drains at Will Rogers State Beach and Topanga County Beach, 100 yards from Ramirez Creek at Paradise Cove, and 100 yards around the Santa Monica Pier and Topanga Canyon Beach lagoon.
The entire swimming areas at Mother's Beach in Marina del Rey and Inner Cabrillo Beach in San Pedro are also closed to the public.
Conversely, authorities lifted the warning for the Redondo Beach Pier after recent sample results showed bacteria levels returned to safe baselines.
The surge in bacteria levels matches ongoing regional heatwaves and runoff, which arrived alongside extended weather advisories from the National Weather Service.
Heat Advisory Extended
Forecasters extended current heat advisories through July 14 as valley temperatures threaten to reach 112 degrees due to weakened onshore winds.
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"There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors," stated the National Weather Service.
Meteorologists noted that a temporary weekend cooling trend will quickly give way to higher humidity levels across Southern California mountains and valleys.
"Additionally, monsoonal moisture will add to the discomfort level from the heat next week," the National Weather Service added.
In neighboring Orange County, the environmental health division separately managed a quarter-mile ocean closure at Thalia Beach in Laguna Beach.
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That incident followed a 2,000-gallon sewage spill caused by a mechanical malfunction in a force main sewer line pump.
