1,287
Recorded events
73
Counties affected
5
Direct deaths
$8.8M
Property damage
Puerto Rico flood history: 1,287 recorded events across 73 counties between 1996 and 2025.
Decade by decade
Puerto Rico flood history by decade
The 2020s are the busiest decade on record with 615 reported flood events across Puerto Rico. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most flood events in Puerto Rico
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | San Juan Municipio | 227 | 0 | $252K | 1998–2025 |
| #2 | Aguadilla Municipio | 60 | 1 | $264K | 1996–2025 |
| #3 | Ponce Municipio | 59 | 1 | $20K | 1998–2025 |
| #4 | Naguabo Municipio | 55 | 0 | $56K | 2010–2025 |
| #5 | Carolina Municipio | 54 | 0 | $42K | 2011–2025 |
| #6 | Mayagüez Municipio | 51 | 0 | $32K | 1998–2025 |
| #7 | Guaynabo Municipio | 50 | 0 | $16K | 2009–2025 |
| #8 | Vega Alta Municipio | 41 | 0 | $7K | 2009–2025 |
| #9 | Bayamón Municipio | 38 | 0 | $54K | 1997–2025 |
| #10 | Caguas Municipio | 38 | 0 | $36K | 1997–2025 |
| #11 | Aguada Municipio | 32 | 0 | $15K | 2001–2025 |
| #12 | Arecibo Municipio | 27 | 0 | $62K | 1998–2025 |
| #13 | Adjuntas Municipio | 27 | 0 | $46K | 1997–2024 |
| #14 | Cabo Rojo Municipio | 25 | 0 | $76K | 1996–2025 |
| #15 | San Sebastián Municipio | 24 | 1 | $18K | 2013–2025 |
| #16 | Humacao Municipio | 21 | 0 | $48K | 1998–2024 |
| #17 | Fajardo Municipio | 20 | 0 | $39K | 2009–2025 |
| #18 | Manatí Municipio | 20 | 0 | $31K | 2010–2025 |
| #19 | Vega Baja Municipio | 17 | 0 | $25K | 2009–2025 |
| #20 | Toa Baja Municipio | 16 | 0 | $47K | 2010–2025 |
| #21 | Río Grande Municipio | 15 | 0 | $2K | 2012–2024 |
| #22 | Salinas Municipio | 14 | 0 | $16K | 1999–2025 |
| #23 | Aguas Buenas Municipio | 14 | 1 | $1K | 1996–2024 |
| #24 | Yauco Municipio | 14 | 0 | $10K | 2012–2025 |
| #25 | Hormigueros Municipio | 14 | 0 | $18K | 2013–2025 |
Significant events
Deadliest flood events in Puerto Rico
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Mar 8, 2001 | Aguadilla Municipio | — | 1 | 0 |
| Sep 22, 2008 | Aguas Buenas Municipio | — | 1 | 0 |
| Aug 18, 2018 | Ponce Municipio | — | 1 | 0 |
| Jan 23, 2009 | San Lorenzo Municipio | — | 1 | 0 |
| Apr 12, 2018 | San Sebastián Municipio | — | 1 | 0 |