Summit County, UT
FEMA National Risk Index scores, disaster declarations & hazard data
Summit County has experienced 10 federally declared disasters since 1977, most recently Rocky Canyon Fire in 2026. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Summit County's highest-rated hazards are avalanche, wildfire, and landslide, with its top risk rated "Very High" by FEMA's National Risk Index. Community vulnerability is relatively low (5th percentile nationally), indicating stronger recovery capacity than most US counties.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Summit County has been designated in 10 declarations since 1977, covering 5 disaster types including fire (3), flood (3), biological (2).
| Year | Type | Event name |
|---|---|---|
| 2026 | Fire | Rocky Canyon Fire |
| 2021 | Fire | Parleys Canyon Fire |
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2013 | Fire | Rockport Five Fire |
| 2011 | Flood | Flooding |
| 2005 | Coastal Storm | Hurricane Katrina Evacuation |
| 1984 | Flood | Severe Storms, Mudslides, Landslides & Flooding |
| 1983 | Flood | Severe Storms, Landslides & Flooding |
| 1977 | Drought | Drought |
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 | 96.5 | 0 | 0 | — |
| Inland Flooding | Relatively Low | 49.6 | 1 | 0 | $1K |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Very Low | 55.5 | 1 | — | — |
| Heat Wave | Very Low | 14 | 0 | 0 | — |
| Tornado | Very Low | 13.6 | 0 | 0 | — |
| Hurricane | Not Applicable | — | 0 | 0 | — |
| Hail | Very Low | 9.8 | 2 | 0 | — |
| Strong Wind | Relatively Moderate | 61.9 | 0 | 0 | — |
| Winter Weather | Relatively High | 87 | 0 | 0 | — |
| Ice Storm | Very Low | 13.7 | — | — | — |
| Cold Wave | Very Low | 8.2 | — | — | — |
| Lightning | Relatively High | 91.3 | 0 | 0 | — |
| Drought | Very Low | 27.2 | 0 | 0 | — |
| Landslide | Relatively Moderate | 92.3 | 0 | 0 | — |
| Avalanche | Very High | 98.1 | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic Activity | Very Low | 39.1 | — | — | — |
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
Summit County ranks in the 5th percentile (Very 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 | 5th | Very low |
| Socioeconomic status | 3rd | Very low |
| Household characteristics | 25th | Low |
| Racial & ethnic minority status | 46th | Low |
| Housing type & transportation | 9th | Very 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 | 86th | Very High |
| Risk to homes | 89th | Very High |
| Buildings in direct exposure zone | 74.8% | — |
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 Summit County?
According to the FEMA National Risk Index, the highest-risk hazards in Summit County, Utah are avalanche, wildfire, and landslide. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Summit County received federal disaster declarations?
Yes. Summit County has received 10 federal disaster declarations since 1977, including declarations in 2026. The most common disaster type on record is fire (3 declarations).
Has Summit County had any FEMA disaster declarations in 2024, 2025, or 2026?
Yes. Recent federal disaster declarations for Summit County include Rocky Canyon Fire (2026). See the declarations table above for the full history since 1977.
How does Summit County's natural hazard risk compare to nearby counties?
Among neighboring counties, Salt Lake County, UT has the highest overall natural hazard risk (Relatively High) and Rich County, UT has the lowest (Very Low). Summit County is rated Relatively Low overall.
How is Summit County's composite disaster risk index calculated?
Summit 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. Summit County's composite score of 60 means its overall natural hazard risk is higher than 60% of US counties.