53
Recorded events
0
Direct deaths
0
Direct injuries
$60.0M
Property damage
Flash Flood in Richmond County, New York: 53 recorded events between 1996 and 2025. The strongest on record measured 0. That places the county #561 nationally and #37 statewide for this hazard.
Decade by decade
Flash Flood in Richmond County, New York: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flash flood in Richmond County is the 2000s, when 17 of the county's 53 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 Richmond County archive, flash flood makes up 26.0% of all recorded severe weather across 8 hazard types. Nationally the county sits at #561 for this hazard and #37 within New York, putting it in the 81.5 percentile of all U.S. counties.
Seasonality
Events by month
Sep is the peak month for flash flood in Richmond County with 15 recorded events, while Feb 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 |
|---|---|---|---|
| Jul 31, 2025 | ELM PARK | 0 | $0 |
| Sep 2, 2021 | RICHMOND | 0 | $0 |
| Sep 2, 2021 | ANNADALE | 0 | $0 |
| Sep 2, 2021 | CASTLETON CORNERS | 0 | $0 |
| Sep 2, 2021 | CASTLETON CORNERS | 0 | $0 |
| Sep 2, 2021 | ST GEORGE | 0 | $60.0M |
| Sep 1, 2021 | PLEASANT PLAINS | 0 | $0 |
| Sep 1, 2021 | WILLOWBROOK | 0 | $0 |
| Sep 1, 2021 | GREAT KILLS | 0 | $0 |
| Aug 27, 2021 | RICHMOND VLY | 0 | $0 |
Other hazards here
More from Richmond County
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
The entrance to the westbound Staten Island Expressway (I-278) from Richmond Ave. was closed due to flooding. In addition, floodwaters were 1-2 ft high on Richmond Terrance near Nicholas Ave. in the neighboorhood of Port Richmond.
Rainfall falling at the rate of nearly two inches per hour caused flash flooding of streets across Staten Island. Hylan Blvd was affected the worst with at least a foot of water being observed flowing swiftly down the street.
Quick answers
Frequently asked
How many flash flood events are on record in Richmond County, New York?
53 flash flood events are recorded in Richmond County between 1996 and 2025, causing 0 direct deaths.
What is the strongest flash flood recorded in Richmond County?
The strongest flash flood on record in Richmond County measured 0.
Where does the flash flood data for Richmond 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
“Flash Flood in Richmond County, New York.” Severe Weather History. severeweatherhistory.com/county/new-york/richmond-county/flash-flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.