Carbon, MT
Carbon County in Montana has 5 FEMA disaster declarations on record covering 1978–2023, most recently Flooding on Oct 11, 2023 (DR-4745). Its flood risk grade is A (Low risk), ranking #1824 of 3,277 U.S. counties, with 1 NFIP flood insurance claims totaling $0 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Carbon County
The 5 most recent federally declared disasters affecting Carbon County, MT (1978–2023). Total declarations on record: 5.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Oct 11, 2023 | Flood | Flooding | DR-4745 |
| Jun 16, 2022 | Flood | Severe Storm and Flooding | DR-4655 |
| Oct 31, 2018 | Flood | Flooding | DR-4405 |
| Sep 13, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3253 |
| May 29, 1978 | Flood | Severe Storms & Flooding | DR-558 |
Score Breakdown
The composite score of 10 is calculated from four weighted factors. See our methodology for details.
Other Counties in Montana
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Daniels | A | 10 | 0 | 5 |
| Fergus | A | 10 | 0 | 5 |
| Garfield | A | 10 | 0 | 4 |
| Golden Valley | A | 10 | 0 | 4 |
| Musselshell | A | 10 | 0 | 5 |
| Petroleum | A | 10 | 0 | 5 |
More Counties in Montana
Frequently Asked Questions
How many FEMA disaster declarations does Carbon County, MT have?
Carbon County, MT has 5 federal disaster declarations on FEMA record (1978–2023). The 5 most recent are: Flooding (declared Oct 11, 2023, DR-4745); Severe Storm and Flooding (declared Jun 16, 2022, DR-4655); Flooding (declared Oct 31, 2018, DR-4405); Hurricane Katrina Evacuation (declared Sep 13, 2005, DR-3253); Severe Storms & Flooding (declared May 29, 1978, DR-558). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Carbon County, MT?
Carbon County is graded A (composite score 10/100, low risk). It ranks #1824 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 Carbon County?
1 NFIP flood insurance claims have been filed in Carbon County, MT, totaling $0 in payouts. The average claim is $0. Source: FEMA FimaNfipClaims v2 dataset.
Has Carbon County, MT had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Carbon County was Flooding on Oct 11, 2023 (DR-4745). The county has 5 declared disasters in the OpenFEMA record covering 1978–2023.
For this entity, the underlying data on this page comes from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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.