Low-lying stretches of Point San Pedro Road face tidal flooding as a coastal flood advisory continues through 6 p.m. Saturday, Oct. 31.

The National Weather Service’s Oct. 28 advisory warns that water could reach up to 1.9 feet above ground in vulnerable shoreline areas. It anticipates greater flooding impacts along Marin County’s Bay shoreline.

The Point San Pedro Road Coalition warned residents in an Oct. 26 announcement that high tides could flood low-lying sections of the road.

The group urged extra caution during high tides. Marin County advises people not to drive, walk or bike through floodwater.

Vulnerable road sections

The coalition’s tides and flooding guide identifies the stretch near Marin Yacht Club, between Summit Avenue and Marina Boulevard, as particularly vulnerable. It also identifies sections near San Rafael High School and Riviera Drive.

Water levels and timing vary around the Bay. San Francisco gauge forecasts should not be treated as exact predictions for Point San Pedro Road.

The coalition said Marin County plans to deploy temporary tidal flood barriers near 243 Point San Pedro Road to reduce flooding during extreme tides and winter storms. Its announcement describes a planned deployment, not completed installation.

Flooding has affected other Marin communities. In an Oct. 28 update, the county’s emergency portal listed closures on Miller Avenue in Mill Valley and roads in Larkspur. Residents should check the portal for changing conditions before traveling.

Preparation resources

The coalition lists Peacock Gap Park and the San Rafael Rock Quarry as sandbag locations. It says the quarry station operates from 7 a.m. to 3 p.m. Monday through Friday, excluding holidays.

Residents should check access and supplies before traveling. The county’s sandbag directory cautions that supplies can run out and recommends bringing a shovel.

The coalition also announced a Zoom presentation on flood preparation for Saturday, Nov. 7, featuring the City of San Rafael. Meeting details are linked from its Oct. 26 announcement.

Residents can monitor road impacts through Marin County’s emergency portal and sign up for AlertMarin.