Nevada inland flooding risk
Clark County has the highest inland flooding risk in Nevada, scoring 99.6 out of 100 — rated "Very High" by FEMA's National Risk Index. Recorded inland flooding events across Nevada have increased 58% over the past five years compared to the prior five-year period.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Clark County | 99.6 | Very High | 140 |
| 2 | Washoe County | 94.5 | Relatively High | 28 |
| 3 | Nye County | 81.9 | Relatively Moderate | 28 |
| 4 | Douglas County | 73.8 | Relatively Moderate | 10 |
| 5 | Lyon County | 63.5 | Relatively Low | 9 |
| 6 | Elko County | 54.5 | Relatively Low | 20 |
| 7 | Churchill County | 53.2 | Relatively Low | 0 |
| 8 | Carson City | 46.1 | Relatively Low | 0 |
| 9 | Lincoln County | 39 | Relatively Low | 33 |
| 10 | White Pine County | 24.1 | Very Low | 6 |
| 11 | Humboldt County | 17 | Very Low | 6 |
| 12 | Lander County | 15.7 | Very Low | 7 |
| 13 | Mineral County | 12.9 | Very Low | 8 |
| 14 | Storey County | 9.8 | Very Low | 7 |
| 15 | Eureka County | 7.7 | Very Low | 14 |
| 16 | Pershing County | 7.5 | Very Low | 1 |
| 17 | Esmeralda County | 4.7 | Very Low | 3 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Inland Flooding risk nationally:
Other hazard risks in Nevada:
Frequently asked questions
What is the highest inland flooding risk county in Nevada?
Clark County, NV has the highest inland flooding risk in Nevada, with a FEMA National Risk Index score of 99.6 out of 100 (rated "Very High").
How many counties in Nevada are rated Very High for inland flooding risk?
1 of 17 scored Nevada counties are rated "Very High" for inland flooding risk by FEMA's National Risk Index.
What causes inland flooding risk in Nevada?
Inland flooding covers riverine and surface (pluvial) flooding — the most common and costly natural disaster type in the US. High scores appear across river floodplains in the Midwest, South, and Mid-Atlantic, where legacy development in flood-prone areas and aging stormwater infrastructure concentrate risk.