From Sfchronicle · · 1m 40s
Bay Area flood risk maps: See which areas face the greatest dangers
Bay Area flood risk maps show where high tides and storms could flood homes.
In brief
Bay Area flood risk maps show where high tides and storms could flood homes. Four flood risk maps help Bay Area residents understand their flood exposure risks. Originally reported by Sfchronicle.
Flooding varies by location
Flooding looks different depending on where you live in the Bay Area.
FEMA flood risk map
FEMA produces maps showing places with at least a 1% chance of flooding in any year.
FEMA map limitations
FEMA maps don’t cover local stormwater drainage systems and update every five years.
California Department of Water Resources map
California identifies additional areas with similar flood risk levels for awareness purposes.
First Street flood risk map
First Street calculates flood risk at the property level with a 1% annual chance of flooding.
First Street map details
First Street estimates 90% of properties in some San Mateo County census tracts face a 1% annual flood risk.
Coastal flood exposure map
Coastal flooding could reach 3 feet above normal high tides in some areas.
Coastal flood scenario
The 3-foot scenario could flood Highway 37 and low-lying South San Francisco Bay areas.
Pacific coast flood map
USGS models show flooding scenarios along the Pacific coast and bay shorelines.
San Francisco stormwater map
SFPUC shows where stormwater flooding could occur during a 1% chance storm.
Stormwater flooding risk
Stormwater flooding could affect areas not fully served by SFPUC’s combined sewer system.
Flood risk maps for Bay Area
Four flood risk maps help Bay Area residents understand their flood exposure risks.
The key point
Four flood risk maps help Bay Area residents understand their flood exposure risks.
