While the origin of the spill is more than 30 miles away, the sewage was expected to make its way to Long Beach shores via the San Gabriel River, the city said.

Coastal swimming areas in Long Beach remained closed Friday due to a sewage spill. The spill occurred in Rowland Heights after a grease accumulation led to the overflow of a main sewer line, causing a spill of 10,

The spill happened almost 30 miles away from Long Beach, but sewage washing into the San Gabriel River triggered a mandatory closure.