Dec 31, 2005
Widespread flooding occurred in the county, due to small streams over-flowing and poor drainage problems. The bulk of the damage occurred in East Palo Alto, San Mateo, Daly City, Colma, Brisbane, San Bruno, South San Francisco and Pacifica. Around 2 to 3 inches of rain fell on the area in a 24 hour period. The flooding continued into the first few days of January 2006.
Source: NOAA National Weather Service Storm Events Database (event 5482519). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in San Mateo County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.