Natrona County, WY
FEMA National Risk Index scores, disaster declarations & hazard data
Natrona County has experienced 8 federally declared disasters since 1978, most recently Flooding in 2023. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Natrona County's highest-rated hazards are winter weather, wildfire, and landslide, with its top risk rated "Very High" by FEMA's National Risk Index. NOAA records 61 storm events in the county over the past decade.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Natrona County has been designated in 8 declarations since 1978, covering 3 disaster types including fire (4), flood (2), biological (2).
| Year | Type | Event name |
|---|---|---|
| 2023 | Flood | Flooding |
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2016 | Fire | Station Fire |
| 2012 | Fire | Sheep Herder Hill Fire Complex |
| 2006 | Fire | Jackson Canyon Fire |
| 2000 | Fire | Wy - Dead Horse Fire |
| 1978 | Flood | Severe Storms, Flooding & Mudslides |
Source: FEMA OpenFEMA Disaster Declarations Summaries. A single disaster can produce more than one record per county. Data current through September 2026.
Risk by hazard type
| Hazard | Risk rating | Risk score | Recorded events | Deaths | Prop. damage |
|---|---|---|---|---|---|
| Wildfire | Relatively Moderate | 93 | 0 | 0 | — |
| Inland Flooding | Relatively Moderate | 74.7 | 6 | 0 | $2.9M |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Relatively Low | 82.8 | 5 | — | — |
| Heat Wave | Very Low | 17.2 | 8 | 0 | — |
| Tornado | Relatively Low | 36.9 | 5 | 0 | $100K |
| Hurricane | Not Applicable | — | 0 | 0 | — |
| Hail | Relatively Low | 41.1 | 43 | 0 | $1K |
| Strong Wind | Very Low | 5.6 | 0 | 0 | — |
| Winter Weather | Very High | 97.1 | 0 | 0 | — |
| Ice Storm | Relatively Low | 41.7 | — | — | — |
| Cold Wave | Relatively Moderate | 82.5 | — | — | — |
| Lightning | Relatively Moderate | 67.3 | 0 | 0 | — |
| Drought | Very Low | 21 | 0 | 0 | — |
| Landslide | Relatively Moderate | 91.7 | 0 | 0 | — |
| Avalanche | Relatively Moderate | 81.6 | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic Activity | Not Applicable | — | — | — | — |
Scores are 0–100 percentiles relative to all US counties — higher means more exposed, not that a disaster is likely this year. Event counts: NOAA Storm Events 2016–2026; earthquake counts from USGS ComCat (M3.0+, 1996–2026). See the methodology page for details.
Community vulnerability
Natrona County ranks in the 40th percentile (Low) for community vulnerability — a measure of how hard disaster impacts tend to hit residents. Higher vulnerability means more displacement, worse health outcomes, and slower recovery after a disaster.
| SVI theme | Percentile | Vulnerability level |
|---|---|---|
| Overall | 40th | Low |
| Socioeconomic status | 30th | Low |
| Household characteristics | 58th | Moderate |
| Racial & ethnic minority status | 42nd | Low |
| Housing type & transportation | 46th | Low |
Source: CDC/ATSDR Social Vulnerability Index 2022. Percentiles compare counties nationally — higher means more vulnerable relative to other counties. See CDC SVI for full methodology.
Future risk outlook
| Wildfire metric | National percentile | Level |
|---|---|---|
| Burn probability | 77th | Relatively High |
| Risk to homes | 81st | Very High |
| Buildings in direct exposure zone | 28.0% | — |
NOAA tracked 61 weather events in this county over 2016–2025: 32 in 2016–20 vs 29 in 2021–25 (-9% — relatively stable).
Wildfire: USDA Forest Service Wildfire Risk to Communities (RDS-2020-0016-2) — modeled values, not annual forecasts. See wildfirerisk.org. Inland flood and heat projections pending data availability; coastal sea-level projections are available for select coastal counties below — see the data page.
Nearby counties
Frequently asked questions
What natural hazards pose the greatest risk in Natrona County?
According to the FEMA National Risk Index, the highest-risk hazards in Natrona County, Wyoming are winter weather, wildfire, and landslide. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Natrona County received federal disaster declarations?
Yes. Natrona County has received 8 federal disaster declarations since 1978, including declarations in 2023. The most common disaster type on record is fire (4 declarations).
Has Natrona County had any FEMA disaster declarations in 2024, 2025, or 2026?
No federal disaster declarations have been recorded for Natrona County since the start of 2024. Its most recent declaration on record is Flooding in 2023.
How does Natrona County's natural hazard risk compare to nearby counties?
Among neighboring counties, Fremont County, WY has the highest overall natural hazard risk (Relatively Low) and Hot Springs County, WY has the lowest (Very Low). Natrona County is rated Relatively Low overall.
How is Natrona County's composite disaster risk index calculated?
Natrona County's composite disaster risk index — officially FEMA's National Risk Index (NRI) — scores every US county on a 0–100 percentile scale across 18 natural hazard types, factoring in expected annual loss, social vulnerability, and community resilience. Natrona County's composite score of 69 means its overall natural hazard risk is higher than 69% of US counties.