San Rafael's Canal neighborhood, home to 12,000 residents and ranked the Bay Area's most flood-vulnerable community, is at the center of a countywide sea level rise strategy the Marin County Board of Supervisors considered on July 14.
The Board met at 9 a.m. in the Board Chamber at the Marin County Civic Center, 3501 Civic Center Drive, to receive the final recommendations of a $519,000, two-year study by engineering firm AECOM. The study found Marin faces approximately $17 billion in long-term adaptation needs across more than 110 miles of bay and coastal shoreline.
For Canal District residents, the threat is immediate.
The Transportation Authority of Marin projects the neighborhood's two main exit roads will be permanently inundated by 2050. The district is sinking at roughly 0.4 inches per year even as sea levels climb. Flood adaptation for the Canal alone could cost $719 million to $1.9 billion, according to a draft feasibility study published in October 2025.
"It's not a future problem, it's a right now problem," said Isabel French, director of marketing and communications at Canal Alliance, a San Rafael nonprofit serving Latino immigrants.
Rita Mazariegos, a Canal District resident who serves on a community sea level rise steering committee, told the San Francisco Chronicle that displacement is a constant worry for neighbors who lack affordable housing options if flooding forces them out.
What the study recommends
The Board was asked to formally accept the AECOM report and provide direction for the county's newly established Climate Office.
Rather than creating a new governing agency, the report recommends strengthening voluntary collaboration between the county, eight incorporated cities and towns, special districts, and regional partners through shared technical expertise, coordinated grant strategies, and regional partnerships. The study found that fragmented coordination, limited staffing at smaller cities, regulatory complexity, and funding challenges have slowed progress.
Dr. Nadia Seeteram, the county's Chief Climate Officer, said in a county statement that the report "clarifies shared priorities across Marin" and will guide future coordination efforts and improve the county's ability to secure funding for projects that protect communities, infrastructure, and natural resources.
The San Rafael Record will report the Board's decision in a follow-up.
Funding picture
Marin experienced some of its worst flooding in decades in early January 2026, according to the San Francisco Chronicle, when storms coincided with record-high king tides and flooded a 15-mile stretch from Sausalito to San Rafael. The county now faces an immediate $25 million need to repair an aging San Rafael levee damaged during those storms.
Federal funding applications for $13.5 million to address flooding at the Highway 101 exit into Marin City and $18 million to strengthen the San Rafael levee were blocked by the Trump administration, the Marin Independent Journal reported.
California's Proposition 4, a climate bond voters approved in 2024, sets aside $1.2 billion for coastal resilience in the San Francisco Bay, though Marin's share would cover only a fraction of the $17 billion need. Under Prop. 4, 40% of funding must benefit disadvantaged communities, which could include the Canal District.
Tuesday's meeting was open to the public and livestreamed at marincounty.gov.
