Update, 6:10 p.m.
Highway 1 at 13th Street has been closed once again for flooding, according to Caltrans.
Drivers are asked to used alternate routes and exercise caution.
Update, 12:15 p.m.
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Highway 1 at 13 Street reopened at about noon, according to the CHP. Highway 1 and Division Street also has reopened.
Highway 1 at 13th Street in Oceano closed Wednesday due to flooding, the California Highway Patrol said.
Authorities declared a hard closure of the road at about 8:35 a.m., according to the CHP. The flooding was caused by rainfall from a storm that is expected to drop 4 to 6 inches on SLO County by Thursday.
It is unclear when the road will reopen.
Highway 1 is also closed at Ragged Point due to a mudslide that happened Wednesday morning.
Flooding also caused Highway 1 at Division Street near Guadalupe to close at about 9:40 a.m., the CHP said.