Oct 13, 2009
A strong low pressure system made its way through Northern and Central California accompanied by deep tropical moisture and very strong winds. Heavy rain combined with the wind to cause numerous trees, tree limbs and pole/telephone powers to fall. Pacific Gas and Electric reported over 277,000 customers had lost power in the San Francisco and Monterey Bay Areas with a cost of over thirteen million dollars in damages. The record breaking heavy rain also led to flooding and debris flows.
Source: NOAA National Weather Service Storm Events Database (event 200006). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Contra Costa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.