# 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.
- Title: Bay Area flood risk maps: See which areas face the greatest…
- Summary: 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…
- Keywords: flood risk, bay area, fema flood maps, first street flood maps, san francisco bay, stormwater flooding, coastal flooding, flood exposure, Sfchronicle
- Source: Sfchronicle — https://sfchronicle.com/climate/article/flood-risk-map-bay-area-22526040.php
- Read time: 1 min
- Topics: flood risk, bay area, fema flood maps, first street flood maps, san francisco bay, stormwater flooding, coastal flooding, flood exposure, news, local
## 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.
## Key takeaway

Four flood risk maps help Bay Area residents understand their flood exposure risks.