Weather conditions have prompted the San Diego Department of Environmental Health to close Imperial Beach.
Water flowing north from the Tijuana River mouth contains sewage runoff and contamination.
"Signs warning of sewage contaminated water will remain in place until field measurements indicate the ocean water is safe for recreational use," said a statement from the health department.
Beaches affected are south of Carnation Avenue to the Tijuana Slough National Wildlife Refuge.
Imperial Beach Closed for Contamination
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