300
Recorded events
61
Counties affected
1
Direct deaths
$3.9M
Property damage
Puerto Rico debris flow history: 300 recorded events across 61 counties between 1996 and 2025.
Decade by decade
Puerto Rico debris flow history by decade
The 2020s are the busiest decade on record with 266 reported debris flow 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 debris flow events in Puerto Rico
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | Utuado Municipio | 22 | 0 | $32K | 2019–2025 |
| #2 | San Sebastián Municipio | 13 | 0 | $18K | 2019–2025 |
| #3 | Adjuntas Municipio | 12 | 0 | $65K | 1996–2025 |
| #4 | Yabucoa Municipio | 10 | 0 | $36K | 2019–2024 |
| #5 | Bayamón Municipio | 10 | 0 | $5K | 2019–2024 |
| #6 | Corozal Municipio | 10 | 0 | $14K | 2021–2025 |
| #7 | Caguas Municipio | 9 | 0 | $7K | 2020–2025 |
| #8 | Aibonito Municipio | 8 | 0 | $22K | 2019–2025 |
| #9 | Arecibo Municipio | 8 | 0 | $13K | 2023–2025 |
| #10 | Trujillo Alto Municipio | 7 | 0 | $3K | 2021–2025 |
| #11 | Naguabo Municipio | 7 | 0 | $35K | 2019–2024 |
| #12 | Ciales Municipio | 7 | 0 | $61K | 2024–2025 |
| #13 | Ponce Municipio | 7 | 0 | $14K | 2022–2025 |
| #14 | Moca Municipio | 7 | 0 | $2K | 2019–2025 |
| #15 | Orocovis Municipio | 6 | 0 | $9K | 2020–2025 |
| #16 | Aguas Buenas Municipio | 6 | 0 | $4K | 2020–2024 |
| #17 | Morovis Municipio | 6 | 0 | $34K | 2023–2025 |
| #18 | Barranquitas Municipio | 6 | 0 | $91K | 2019–2025 |
| #19 | Humacao Municipio | 6 | 0 | $47K | 2019–2024 |
| #20 | Toa Alta Municipio | 6 | 0 | $5K | 2020–2025 |
| #21 | Luquillo Municipio | 6 | 0 | $4K | 2021–2023 |
| #22 | Mayagüez Municipio | 6 | 0 | $4K | 2020–2025 |
| #23 | Salinas Municipio | 6 | 0 | $3.0M | 2022–2025 |
| #24 | Naranjito Municipio | 6 | 0 | $41K | 2019–2025 |
| #25 | San Germán Municipio | 5 | 0 | $3K | 2019–2025 |
Significant events
Deadliest debris flow events in Puerto Rico
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Jan 22, 1997 | Camuy Municipio | — | 1 | 1 |