What is the difference between tidal flooding and stormwater/residual flooding?
Flood risk in San Mateo is influenced from two sources: tides in the San Francisco Bay, and residual flooding from storm water runoff. High tides can cause or exacerbate flooding in low-lying areas between El Camino Real and the Bay. In contrast, stormwater/residual flooding occurs during large storm events. Essentially when it rains, urban stormwater runoff can exceed the capacity of the collection system and surface flooding occurs.

Show All Answers

1. What is the National Flood Insurance Program?
2. What is the "new" FEMA map?
3. How do I obtain a copy of the flood hazard map for the City of San Mateo?
4. Why do I need to purchase insurance if there has never been a flood in the neighborhood?
5. Why is purchasing flood insurance important to homeowners?
6. Is flood insurance required for all structures in the floodplain?
7. What is the difference between tidal flooding and stormwater/residual flooding?
8. What other projects are needed to get my neighborhood out of the flood zone?
9. What is the City doing to help residents stuck in the flood zone?
10. Why doesn’t the City form assessment districts to fund completion of all flood related projects?
11. How do I purchase a flood insurance policy?
12. How are flood insurance premium rates calculated?
13. If my agent has questions where should he/she call?
14. What processes are available for changing or correcting the information shown on the flood hazard map when large areas of a community are affected?
15. Why is the burden of proof placed on the community or person that requests a map change?
16. What can homeowners do if they believe their homes should not be included in an SFHA?
17. Under what circumstances will FEMA waive the review and processing fee for a map change request?
18. Where can I learn more about the National Flood Insurance Program?
19. Why did a lien show up on the property report in February 2020?
20. How do I obtain a flood elevation certificate for my property?