Lemhi, ID
Lemhi County in Idaho has 1 FEMA disaster declaration on record covering 2005, most recently Hurricane Katrina on Sep 13, 2005 (DR-3244). Its flood risk grade is A (Low risk), ranking #3036 of 3,277 U.S. counties, with 1 NFIP flood insurance claims totaling $9,759 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Lemhi County
The 1 most recent federally declared disasters affecting Lemhi County, ID (2005). Total declarations on record: 1.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Sep 13, 2005 | Hurricane | Hurricane Katrina | DR-3244 |
Score Breakdown
The composite score of 8 is calculated from four weighted factors. See our methodology for details.
Other Counties in Idaho
More Counties in Idaho
Frequently Asked Questions
How many FEMA disaster declarations does Lemhi County, ID have?
Lemhi County, ID has 1 federal disaster declarations on FEMA record (2005). The 1 most recent are: Hurricane Katrina (declared Sep 13, 2005, DR-3244). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Lemhi County, ID?
Lemhi County is graded A (composite score 8/100, low risk). It ranks #3036 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 Lemhi County?
1 NFIP flood insurance claims have been filed in Lemhi County, ID, totaling $9,759 in payouts. The average claim is $9,759. Source: FEMA FimaNfipClaims v2 dataset.
Has Lemhi County, ID had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Lemhi County was Hurricane Katrina on Sep 13, 2005 (DR-3244). The county has 1 declared disasters in the OpenFEMA record covering 2005.
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.