91
Recorded events
0
Direct deaths
0
Direct injuries
$15K
Property damage
Flood in San Francisco County, California: 91 recorded events between 2002 and 2025. The strongest on record measured 0. That places the county #70 nationally and #16 statewide for this hazard.
Decade by decade
Flood in San Francisco County, California: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in San Francisco County is the 2010s, when 60 of the county's 91 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the San Francisco County archive, flood makes up 67.4% of all recorded severe weather across 7 hazard types. Nationally the county sits at #70 for this hazard and #16 within California, putting it in the 97.6 percentile of all U.S. counties.
Seasonality
Events by month
Dec is the peak month for flood in San Francisco County with 26 recorded events, while May is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Dec 25, 2025 | OCEAN VIEW | 0 | $0 |
| Dec 22, 2025 | SAN FRANCISCO | 0 | $0 |
| Feb 13, 2025 | OCEAN VIEW | 0 | $0 |
| Feb 4, 2025 | OCEAN VIEW | 0 | $0 |
| Dec 29, 2024 | SAN FRANCISCO | 0 | $0 |
| Nov 23, 2024 | OCEAN VIEW | 0 | $0 |
| Nov 22, 2024 | SAN FRANCISCO | 0 | $0 |
| Mar 2, 2024 | SAN FRANCISCO | 0 | $10 |
| Feb 21, 2024 | SAN FRANCISCO | 0 | $0 |
| Feb 4, 2024 | SAN FRANCISCO | 0 | $10 |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Shortly before 6:00 a.m., the California Highway Patrol closed the Interstate 280 extension between Sixth Street and Highway 101 because of flooding. At 7:00 a.m. all lanes of Southbound Interstate 280 at Cesar Chavez Street were flooded.
KPIX reported flooding on I-280 near Ocean Ave causing a severe traffic alert to be issued https://sanfrancisco.cbslocal.com/video/4222933-chp-issues-traffic-alert-as-severe-rain-causes-flooding-on-i-280-in-sf/. Timing is estimated.
Quick answers
Frequently asked
How many flood events are on record in San Francisco County, California?
91 flood events are recorded in San Francisco County between 2002 and 2025, causing 0 direct deaths.
What is the strongest flood recorded in San Francisco County?
The strongest flood on record in San Francisco County measured 0.
Where does the flood data for San Francisco County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flood in San Francisco County, California.” Severe Weather History. severeweatherhistory.com/county/california/san-francisco-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.