SoCal Beaches Pose Health Risks After Rain, Officials Warn

Bacteria, chemicals, and trash runoff could contaminate ocean waters, prompting advisories.

Apr. 13, 2026 at 5:55pm

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An extreme close-up X-ray photograph revealing the intricate internal structure of a storm drain pipe, conceptually representing how urban runoff can contaminate nearby beaches and ocean waters.An X-ray view exposes the hidden hazards that heavy rains can flush into Southern California's coastal waters.Los Angeles Today

The Los Angeles County Public Health Department has issued a warning for beachgoers to avoid all contact with the water due to the potential of bacteria, chemicals, and other health hazards from street runoff following recent rains. Such advisories are typical after rainfall, as the water can become contaminated with pollutants from city streets and mountain areas, especially near storm drains, creeks, and rivers.

Why it matters

These types of post-rain health advisories are common in Southern California, where heavy storms can quickly flush a variety of contaminants into the ocean. Ignoring these warnings can lead to illness, as people who enter the water in affected areas risk exposure to bacteria and other hazardous substances.

The details

The advisory is in place until 8 a.m. Tuesday and may be extended if more rain falls. The warning was prompted by a storm system that brought scattered showers to the Los Angeles area on Sunday and Monday. Dry and warm weather is expected to return after Monday.

  • The advisory is in place until 8 a.m. Tuesday (April 14, 2026).
  • The warning was prompted by a storm system that brought rain on Sunday and Monday (April 13-14, 2026).

The players

Los Angeles County Public Health Department

The local government agency responsible for issuing health advisories and warnings for Los Angeles County beaches.

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What’s next

The health department will monitor the situation and may extend the advisory if additional rain falls in the coming days.

The takeaway

This incident highlights the ongoing challenge of maintaining water quality and public health at Southern California beaches, where heavy rains can quickly introduce a variety of contaminants into the ocean, posing risks to beachgoers.