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Using Translation

The County of San Mateo has added a translation feature developed by Google Translate to assist web visitors in understanding information on this website in a variety of foreign languages. Please be aware that Google Translate, a free third party service which the County does not control, provides automated computer translations that may not give you an exact translation. The County cannot guarantee the accuracy of translations through Google Translate so translations should not be considered exact and only used as a rough guide. Anyone relying on information obtained from Google Translate does so at his or her own risk. The County disclaims and will not accept any liability for damages or losses of any kind caused by the use of the Google Translate feature.

Flooding

Floods can happen fast in San Mateo County. Knowing the risks and having a plan helps you protect your family and home.

Flood Risk in San Mateo County

San Mateo County can flood during heavy winter rains and big storms. Low areas near creeks and the coast are most at risk. Floods can block roads, damage homes, and make people sick.

Recent major floods:

  • January 2023: Big storms flooded parts of San Mateo and Half Moon Bay.
  • December 2022: Heavy rain caused creeks to overflow in Belmont and Redwood City.
  • February 2017: Storms flooded Highway 92 and nearby neighborhoods.

10 Ways to Prepare for Floods

  1. Know your evacuation zone.
  2. Sign up for SMC Alert to get flood warnings.
  3. Get sandbags to block water from doors and garages.
  4. Move electrical items above flood level if you can.
  5. Keep important papers in waterproof bags.
  6. Store enough food, water, and medicine for 3 days.
  7. Know your evacuation routes and where to go.
  8. Never drive through flooded roads. Turn around, don’t drown.
  9. Check that sump pumps work and have backup power.
  10. Check if your insurance covers flood damage.

Use These Links to Find Help During Floods

Explore these resources to help you stay informed and supported during floods. From local county services to state and national guidance, these links provide quick access to assistance and preparedness tools.

County Resources
State Resources
Other Resources