St. Thomas, VI
St. Thomas County in VI has 20 FEMA disaster declarations on record covering 1970–2020, most recently Potential Tropical Cyclone Nine on Jul 29, 2020 (DR-3531). Its flood risk grade is A (Low risk), ranking #345 of 3,277 U.S. counties, with 26 NFIP flood insurance claims totaling $897,562 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in St. Thomas County
The 20 most recent federally declared disasters affecting St. Thomas County, VI (1970–2020). Total declarations on record: 20.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Jul 29, 2020 | Hurricane | Potential Tropical Cyclone Nine | DR-3531 |
| Aug 28, 2019 | Hurricane | Hurricane Dorian | DR-3418 |
| Sep 20, 2017 | Hurricane | Hurricane Maria | DR-4340 |
| Sep 18, 2017 | Hurricane | Hurricane Maria | DR-3390 |
| Sep 7, 2017 | Hurricane | Hurricane Irma | DR-4335 |
| Sep 5, 2017 | Hurricane | Hurricane Irma | DR-3383 |
| Sep 28, 2010 | Hurricane | Hurricane Earl | DR-1939 |
| Oct 29, 2008 | Hurricane | Hurricane Omar | DR-1807 |
| Oct 7, 2004 | Hurricane | Tropical Storm Jeanne | DR-1567 |
| Nov 23, 1999 | Hurricane | Hurricane Lenny Major Declaration | DR-1309 |
| Nov 17, 1999 | Hurricane | Hurricane Lenny | DR-3152 |
| Sep 24, 1998 | Hurricane | Hurricane Georges - 18 Sep 98 | DR-1248 |
| Jul 11, 1996 | Hurricane | Hurricane Bertha | DR-1126 |
| Sep 16, 1995 | Hurricane | Hurricane Marilyn | DR-1067 |
| Sep 20, 1989 | Hurricane | Hurricane Hugo | DR-841 |
| Dec 10, 1984 | Hurricane | Tropical Storm Klaus | DR-729 |
| Apr 30, 1983 | Flood | Severe Storms, Flooding & Mudslides | DR-681 |
| Sep 16, 1979 | Hurricane | Hurricane David, Tropical Storm Frederic | DR-602 |
| Nov 14, 1974 | Flood | Severe Storms, Landslides & Flooding | DR-451 |
| Oct 17, 1970 | Flood | Heavy Rains & Flooding | DR-298 |
Score Breakdown
The composite score of 18 is calculated from four weighted factors. See our methodology for details.
Other Counties in VI
More Counties in VI
Frequently Asked Questions
How many FEMA disaster declarations does St. Thomas County, VI have?
St. Thomas County, VI has 20 federal disaster declarations on FEMA record (1970–2020). The 5 most recent are: Potential Tropical Cyclone Nine (declared Jul 29, 2020, DR-3531); Hurricane Dorian (declared Aug 28, 2019, DR-3418); Hurricane Maria (declared Sep 20, 2017, DR-4340); Hurricane Maria (declared Sep 18, 2017, DR-3390); Hurricane Irma (declared Sep 7, 2017, DR-4335). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for St. Thomas County, VI?
St. Thomas County is graded A (composite score 18/100, low risk). It ranks #345 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in St. Thomas County?
26 NFIP flood insurance claims have been filed in St. Thomas County, VI, totaling $897,562 in payouts. The average claim is $34,522. Source: FEMA FimaNfipClaims v2 dataset.
Has St. Thomas County, VI had any recent flood disasters?
Yes. The most recent FEMA declaration affecting St. Thomas County was Potential Tropical Cyclone Nine on Jul 29, 2020 (DR-3531). The county has 20 declared disasters in the OpenFEMA record covering 1970–2020.
this entity is one of the data points covered by this site’s U.S. flood risk, NFIP claims, and disaster declarations dataset. The detail above comes directly from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims; the context that follows situates the headline numbers against the broader distribution across U.S. ZIPs, counties, and states.
The methodology behind every numeric value on this page is publicly documented on the FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. ZIPs, counties, and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: FEMA OpenFEMA datasets, 2026.