With higher temperatures expected to draw crowds to the coast over the Labor Day holiday weekend, Los Angeles County health officials Friday warned swimmers to avoid ocean waters at several beaches due to high bacteria levels.

The affected beaches are:

— Topanga Canyon Lagoon at Topanga County Beach, 100 yards up and down the coast from the lagoon;

— 40th Street extension in Manhattan Beach, 100 yards up and down the coast from the 40th Street extension;

— Manhattan Beach Pier, 100 yards up and down the coast from the pier;

— Hermosa Beach Pier, 100 yards up and down the coast from the pier;

— Redondo Beach Pier, 100 yards up and down the coast from the pier;

— Redondo Beach at Sapphire Street, 100 yards up and down the coast from the storm drain;

— Mothers Beach in Marina Del Rey,

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