49
Recorded events
0
Direct deaths
0
Direct injuries
$107.1M
Property damage
Flood in San Joaquin County, California: 49 recorded events between 2014 and 2026. The strongest on record measured 0. That places the county #248 nationally and #28 statewide for this hazard.
Decade by decade
Flood in San Joaquin County, California: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in San Joaquin County is the 2020s, when 45 of the county's 49 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 Joaquin County archive, flood makes up 42.2% of all recorded severe weather across 8 hazard types. Nationally the county sits at #248 for this hazard and #28 within California, putting it in the 91.5 percentile of all U.S. counties.
Seasonality
Events by month
Jan is the peak month for flood in San Joaquin County with 19 recorded events, while Jun 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 |
|---|---|---|---|
| Apr 21, 2026 | LODI | — | $0 |
| Apr 21, 2026 | STOCKTON | — | $0 |
| Apr 21, 2026 | FAIROAKS | — | $0 |
| Feb 16, 2026 | FARMINGTON | — | $0 |
| Feb 16, 2026 | WAGNER HGTS | — | $0 |
| Feb 16, 2026 | ORFORD | — | $0 |
| Feb 16, 2026 | STOCKTON | — | $0 |
| Jan 4, 2026 | LATHROP | — | $0 |
| Jan 3, 2026 | CLEMENTS | — | $0 |
| Jan 3, 2026 | FAIROAKS | — | $0 |
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
San Joaquin County completed a preliminary estimate of damage from flooding. There was substantial flooding, with around $24.7million in individual assistance/private property loss including 172 properties destroyed and 194 properties with major damage. There was around $82 million in public damages. The estimated grand total as of January 26 was $106.9 million.
San Joaquin County Sheriff issued evacuation orders for 2 locations along the San Joaquin River starting on March 19, 2023. Those two locations include Airport Court, Manteca and Haven Acres Marina in Lathrop due to heavy rain and snowmelt. Evacuation orders were lifted on April 11, 2023.
The media reported that part of New Hope Marina Trailer Park flooded. Local law enforcement arrived to help residents evacuate the area. The manager of the trailer part said that most residents evacuated or moved trailers on their own.
Quick answers
Frequently asked
How many flood events are on record in San Joaquin County, California?
49 flood events are recorded in San Joaquin County between 2014 and 2026, causing 0 direct deaths.
What is the strongest flood recorded in San Joaquin County?
The strongest flood on record in San Joaquin County measured 0.
Where does the flood data for San Joaquin 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 Joaquin County, California.” Severe Weather History. severeweatherhistory.com/county/california/san-joaquin-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.