American Samoa floods
Every recorded flood since 1996 · 2 counties with a record
NOAA's Storm Events Database records 180 floods and flash floods in American Samoa from 1996 through June 30, 2026, about 6.7 a year since 2000. The deadliest was the May 19, 2003 flash flood: 4 deaths, 6 injuries and $81.8 million in damage in 2025 dollars.
Floods in American Samoa, 1996 to 2026
Flood records per year (NOAA Storm Events); 2026 to June 30, 2026.
- recorded, no damage figure
- under $1 million
- $1 million or more
- $10 million or more
- $100 million or more, or 10 deaths
- $1 billion or more, or 100 deaths
- a year's colour: its recorded damage or deaths
- a year with a death
- Records
- 1801996 to June 30, 2026
- A year since 2000
- 6.7average
- Deaths
- 59 injuries
- Damage, 2025 dollars
- $108Mas filed
- Busiest year
- 202539 records
Source: NOAA NCEI Storm Events Database, records through June 30, 2026; deaths and damage as filed, damage in 2025 dollars. Search the record at NCEI.
Are floods and flash floods common in American Samoa?
American Samoa averages about 6.7 floods and flash floods a year since 2000. The busiest year on record was 2025 (39).
Source: NOAA NCEI Storm Events Database, records since 1996, per 10,000 square miles of land area (Census Bureau 2024 Gazetteer; places under 1,000 square miles not ranked). Damage colours: Storm Events damage, 2025 dollars.
When is flood season in American Samoa?
American Samoa's floods and flash floods by month. The busiest month is May (27 records).
The values, month by month
Jan 22 · Feb 17 · Mar 14 · Apr 5 · May 27 · Jun 7 · Jul 18 · Aug 6 · Sep 12 · Oct 13 · Nov 12 · Dec 27 (records).
Source: NOAA NCEI Storm Events Database, records by the month they began, since 1996.
What were the deadliest floods and flash floods in American Samoa?
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2003-05-19 | Flash FloodCountywide A flash flood occurred across Tutuila from Nuuuli Uta to Pago Pago many communities near mountains and valleys. The main stream in Pago Pago rapidly overflow and flooded many homes and businesses along the stream and all of lower Pago Pago. A major landslide buried and killed 3 young men from the age of 18 to 23 years ... | 4 | 6 | $82M | |
| 2025-07-26 | Flash FloodPago Pago One storm episode: 11 records; the totals are the episode's. An extreme rainfall event occurred over American Samoa from July 23rd to 27th, as a trough over the islands converged with a strong ridge from the south. The system dropped 13.62 inches of rain at WSO Pago Pago during this time, including 3.6 inches from 2:50 AM to 6:50 AM on July 26th. This weather event triggered ... | 1 | 3 | $400K |
Source: NOAA NCEI Storm Events Database: deaths direct and indirect, as filed by the National Weather Service, summed over each storm (one episode, or one named storm filed by several offices). Storm names from the titles of FEMA declarations that name the storm's counties.
The costliest floods and flash floods in American Samoa
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2003-05-19 | Flash FloodCountywide | 4 | 6 | $82M | |
| 2015-11-27 | Flash FloodPago Pago | 0 | 0 | $16M | |
| 2022-07-13 | Coastal FloodManu'a District · forecast zone Tutuila | 0 | 0 | $1.9M | |
| 2025-01-10 | Flash FloodPago Pago One storm episode: 8 records; the totals are the episode's. | 0 | 0 | $1.9M | |
| 2025-05-09 | Flash FloodVaitogi One storm episode: 2 records in 2 places; the totals are the episode's. | 0 | 0 | $1.0M | |
| 2007-12-07 | Flash FloodPago Pago | 0 | 0 | $712K | |
| 2000-02-27 | Flash FloodCountywide | 0 | 0 | $686K | |
| 2025-03-24 | Flash FloodVaitogi One storm episode: 7 records; the totals are the episode's. | 0 | 0 | $515K |
Source: NOAA NCEI Storm Events Database: property and crop damage as estimated by the National Weather Service, in 2025 dollars.
Are floods and flash floods becoming more frequent in American Samoa?
American Samoa's count per decade against the whole country's, and its share. NOAA recorded every event type only from 1996, so earlier decades are not comparable; the share of the national total is the fairer comparison across decades.
| Decade | American Samoa | United States | American Samoa's share |
|---|---|---|---|
| 1996-99 | 10 | 20,986 | 0.05% |
| 2000s | 57 | 54,913 | 0.10% |
| 2010s | 30 | 68,322 | 0.04% |
| 2020-26 | 83 | 43,563 | 0.19% |
Source: NOAA NCEI Storm Events Database.
The most recent floods and flash floods in American Samoa
| Date | Record | Character | Killed | Injured | Damage |
|---|---|---|---|---|---|
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $5K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $75K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $5K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $10K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $10K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $80K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $30K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $30K | |
| 2026-05-18 | Flash FloodVaitogi | 0 | 0 | $30K | |
| 2026-05-18 | Flash FloodPago Pago | 0 | 0 | $30K | |
| 2025-11-20 | FloodVaitogi | 0 | 0 | – | |
| 2025-10-22 | FloodVaitogi | 0 | 0 | – |
Source: NOAA NCEI Storm Events Database, records through June 30, 2026; the newest months are revised by NCEI as reports arrive. Search the record at NCEI.
Federal disaster declarations for floods and flash floods in American Samoa
FEMA has declared 5 disasters in American Samoa for floods and flash floods, counting its incident type and declarations that name flood in the title (FEMA files most storm disasters under Severe Storm); 5 were major disasters, the latest on September 15, 2022.
| Declared | Number | Title | Areas named |
|---|---|---|---|
| 2022-09-15 | DR-4669 | High Surf, High Winds, and Flooding | 1 |
| 2014-09-10 | DR-4192 | Severe Storms, Flooding, and Landslides | 5 |
| 2009-09-29 | DR-1859 | Earthquake,Tsunami, and Flooding | 5 |
| 2003-06-06 | DR-1473 | Heavy Rainfall, Flooding, Landslides, and Mudslides | 2 |
| 1979-11-09 | DR-610 | Flooding, Mudslides & Landslides | 5 |
Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), through October 2, 2026. OpenFEMA dataset page.
Next
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