UPDATE 4:55 P.M. — The CHP reports that Highway 1 southbound traffic through Oceano is being detoured and diverted at Pershing Drive (near the Rock 'N' Roll Diner), as well as 13th Street in town. Northbound traffic is being detoured and diverted from Railroad Street (near the Great American Melodrama).
Highway 1 is closed through Oceano between Railroad and Paso Robles Streets as of about 3:30 p.m. Sunday because of flooding, according to the CHP.
Flooding has made the road nearly impassable, according to the CHP's media Web site.
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Traffic is being diverted through 13th Street and other side streets.
That stretch of Highway 1 is a source of perennial flooding during even minor rains. It's unknown how long the road will be closed.