With the rain likely to send bacteria-laden runoff to the coast, Los Angeles County health officials issued the standard warning Monday against swimming in the ocean for the next few days.
A beach water use advisory will be in effect until at least 1 p.m. Thursday.
Health officials cautioned that storm runoff can carry bacteria, chemicals, trash and other health hazards into the ocean, potentially causing sickness in people who swim in contaminated water.
The hazard is particularly high around discharging storm drains, creeks and rivers, health officials said.
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