As San Francisco has developed over time, its hilly topography has been largely paved over. During extreme storms, storm runoff flows still follow the naturally-formed historical waterways. When this occurs, we can experience flooding that sometimes results in property damage.
Is your property on the Draft Map? Please click on the map below to utilize a searchable Draft Map where you can enter in your address to find out.
The SFPUC has developed a Draft 100-Year Storm Flood Risk Map (Draft Map) that shows areas of San Francisco where significant flooding from storm runoff is highly likely to occur during a 100-year storm. A “100-year storm” means a storm with a 1% chance of occurring in a given year. The SFPUC used computer modeling that simulates flooding occurring Citywide under a 100-year storm to identify these parcels.
The purpose of the Draft Map is to inform existing and future property owners about flood risk on their properties and promote resilience. Please find more info on flood resilience efforts below.
The Draft Map shows parcels that are highly likely to experience “deep and contiguous” flooding during a 100-year storm. “Deep and contiguous flooding” means flooding that is at least 6-inches deep spanning an area at least the size of half an average City block.
The City is considering introducing legislation that would require sellers or lessors of property to disclose to buyers or tenants that the property is located within the 100-year storm flood zone.
This Draft Map shows flood risk from storm runoff only. It does not consider flood risk in San Francisco from other causes such as inundation from the San Francisco Bay or Pacific Ocean. Read our full Draft Map Disclaimer.
If you have questions, want to learn more about the Draft Map, or understand what the SFPUC is doing to promote Citywide flood resilience, please attend an upcoming Public Availability Session where project staff will be available answer questions. Also, please review our Information Sheet or contact us at email@example.com.
If you want a hard copy of the Draft Map please download and/or print the PDF(s) below. The Draft map is available by neighborhood or you can download the full Citywide Draft Map:
The SFPUC has come together with other City agencies and stakeholder groups to reduce flood risk that property owners face through infrastructure investments, targeted City services, and innovative new programs. In partnership with our residents, we are building a robust flood resilience strategy. Notifying property owners that they are within a flood zone via the Draft Map is one of the tools we are employing. The SFPUC is taking several other steps, that you can learn about here
Many San Francisco residents have already taken advantage of the SFPUC’s various programs to help them prepare and better protect their properties from major rain events. San Francisco residents can:
In June 2018, the SFPUC will be hosting several public availability sessions to engage with the public, answer questions, and provide information on flood resiliency. On July 24, 2018 the SFPUC Commission will host a hearing on the Draft Map. Additionally, the SFPUC Commission is tentatively scheduled to vote on approving a Final Map at its September 11, 2018 meeting. Later in 2018, the City is considering introducing legislation that would require sellers or lessors of property to disclose to buyers or tenants that the property is located within the 100-year storm flood zone.
Is there a process to review the inclusion of my property in the Map?
The SFPUC Commission is tentatively scheduled to vote on approving a Final Map at its September 11, 2018 meeting. At that time, the SFPUC Commission will also consider approving a procedure allowing property owners who believe their parcel is incorrectly included in the Final Map’s flood zone boundaries to file a request for review. Please continue to check this website for more information.
If you have any questions about the Draft Map or flood resiliency in general, please contact us at RainReadySF@sfwater.org
or (415) 695-7326.