227
Recorded events
0
Direct deaths
0
Direct injuries
$252K
Property damage
Flood in San Juan Municipio, Puerto Rico: 227 recorded events between 1998 and 2025. The strongest on record measured 0. That places the county #8 nationally and #1 statewide for this hazard.
Decade by decade
Flood in San Juan Municipio, Puerto Rico: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in San Juan Municipio is the 2020s, when 112 of the county's 227 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 Juan Municipio archive, flood makes up 45.0% of all recorded severe weather across 13 hazard types. Nationally the county sits at #8 for this hazard and #1 within Puerto Rico, putting it in the 99.8 percentile of all U.S. counties.
Seasonality
Events by month
Oct is the peak month for flood in San Juan Municipio with 39 recorded events, while Jan 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 | SAN JUAN | 0 | $0 |
| Dec 16, 2025 | SAN JUAN | 0 | $0 |
| Dec 16, 2025 | SAN JUAN | 0 | $0 |
| Oct 18, 2025 | SAN JUAN | 0 | $400 |
| Sep 27, 2025 | SAN JUAN | 0 | $400 |
| Sep 27, 2025 | SAN JUAN | 0 | $400 |
| Sep 8, 2025 | SAN JUAN | 0 | $0 |
| Sep 7, 2025 | SAN JUAN | 0 | $0 |
| May 19, 2025 | SAN JUAN | 0 | $5K |
| May 2, 2025 | SAN JUAN | 0 | $500 |
Other hazards here
More from San Juan Municipio
- Flash Flood 203
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Flooding of roads and streets was reported along many sectors of San Juan and adjacent municipalities in association to a frontal boundary that became stationary. The heaviest rainfall fell in the Santurce area of San Juan. Some stranded cars and flooded homes were reported.
San Juan Emergency Managers called to report that, due to flooding, they closed the intersection between Simon Madera St. and PR-8 (Ramal 8) near the Mall of San Juan and Teodoro Moscoso Bridge. This is between San Jose Lake, Villa Olimpica Urbanization and Las Virtudes Urbanization.
Broadcast media reported via social media partial flooding on PR-1 near Milla de Oro, close to MCS, directly in front of Boveda Restaurante. Some lanes were impassable, but vehicles were still able to pass through the available lane, albeit with some difficulty.
Quick answers
Frequently asked
How many flood events are on record in San Juan Municipio, Puerto Rico?
227 flood events are recorded in San Juan Municipio between 1998 and 2025, causing 0 direct deaths.
What is the strongest flood recorded in San Juan Municipio?
The strongest flood on record in San Juan Municipio measured 0.
Where does the flood data for San Juan Municipio 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 Juan Municipio, Puerto Rico.” Severe Weather History. severeweatherhistory.com/county/puerto-rico/san-juan-municipio/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.