ABAG

ABAG has flood resources

Flooding

The Association of Bay Area Governments has online resources on flooding, which various parts of the region have experienced with the recent series of powerful storms. A hazard map is one of the data pieces.

In the Bay Area, winter storms and sea-level rise represent significant flood risks. Mapping resources indicate regulatory zones around flood hazard, and reflect some of the latest research in the rapidly growing field of climate-related flood risk.

Flooding associated with severe storms has been among the most common hazards in the Bay Area during the period from 1950 onward, occurring nearly annually. Often-heavy rainfall brings many areas of localized flooding, especially in low lying areas. 

Flood hazards include:

  • Flooding associated with floodplains, ranging from narrow, confined channels in the steep valleys of mountainous and hilly regions to wide, flat areas in valley and coastal regions;
  • Nuisance flooding caused by heavy precipitation/storm water in flat, low-lying, urbanized areas, resulting in inundation of basements, low-lying roads, and parking lots from street drainage;
  • Coastal flooding associated with Pacific Ocean storms;
  • Sea level rise.

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