Alaska Natural Disaster Risk by County
Of Alaska's 30 counties, 0 have a Very High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025); the highest is Anchorage Municipality (score 97.4 of 100), and expected losses across the state total $941 million a year.
OpenFEMA lists 93 federal disaster, emergency and fire management declarations for Alaska since 1953 (not counting COVID-19); the latest is FM-5672-AK, Mukluk Fire, declared 18 August 2026.
Live weather alerts for Alaska Latest FEMA declarations All official warnings
Most exposed counties, hazard by hazard
Top 10 by FEMA hazard risk scoreTornado 30 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Bethel Census Area | Very Low | $783 |
| 2 | Aleutians East Borough | Very Low | $50 |
| 3 | Kusilvak Census Area | Very Low | $36 |
| 4 | Matanuska-Susitna Borough | Very Low | $7 |
| 5 | Kenai Peninsula Borough | Very Low | $3 |
| 6 | Lake and Peninsula Borough | Very Low | $3 |
| 7 | Southeast Fairbanks Census Area | Very Low | $1 |
| 8 | Fairbanks North Star Borough | Very Low | $2 |
| 9 | North Slope Borough | Very Low | $1 |
| 10 | Yukon-Koyukuk Census Area | Very Low | $1 |
Inland flooding 26 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Matanuska-Susitna Borough | Relatively Low | $8.2 million |
| 2 | Fairbanks North Star Borough | Relatively Low | $7.9 million |
| 3 | Kenai Peninsula Borough | Relatively Low | $5.0 million |
| 4 | Juneau City and Borough | Very Low | $1.8 million |
| 5 | Bethel Census Area | Very Low | $759,399 |
| 6 | Southeast Fairbanks Census Area | Very Low | $793,436 |
| 7 | Yukon-Koyukuk Census Area | Very Low | $527,042 |
| 8 | Nome Census Area | Very Low | $470,387 |
| 9 | Ketchikan Gateway Borough | Very Low | $722,478 |
| 10 | Kodiak Island Borough | Very Low | $669,818 |
Coastal flooding 7 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Juneau City and Borough | Very Low | $14,480 |
| 2 | Sitka City and Borough | Very Low | $6,945 |
| 3 | Kenai Peninsula Borough | Very Low | $6,909 |
| 4 | Anchorage Municipality | Very Low | $4,486 |
| 5 | Ketchikan Gateway Borough | Very Low | $2,508 |
| 6 | Hoonah-Angoon Census Area | Very Low | $593 |
| 7 | Chugach Census Area | Very Low | $558 |
Wildfire 29 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Fairbanks North Star Borough | Relatively Moderate | $13 million |
| 2 | Kenai Peninsula Borough | Relatively Moderate | $7.0 million |
| 3 | Southeast Fairbanks Census Area | Relatively Moderate | $4.9 million |
| 4 | Matanuska-Susitna Borough | Relatively Moderate | $3.8 million |
| 5 | Yukon-Koyukuk Census Area | Relatively Moderate | $1.3 million |
| 6 | Denali Borough | Relatively Low | $806,468 |
| 7 | Bethel Census Area | Relatively Low | $372,225 |
| 8 | Copper River Census Area | Relatively Low | $392,418 |
| 9 | Anchorage Municipality | Relatively Low | $471,184 |
| 10 | Northwest Arctic Borough | Relatively Low | $68,544 |
Earthquake 30 rated
| # | County | Rating | Loss a year |
|---|---|---|---|
| 1 | Anchorage Municipality | Relatively High | $353 million |
| 2 | Matanuska-Susitna Borough | Relatively High | $131 million |
| 3 | Kenai Peninsula Borough | Relatively High | $87 million |
| 4 | Fairbanks North Star Borough | Relatively Moderate | $55 million |
| 5 | Kodiak Island Borough | Relatively Moderate | $14 million |
| 6 | Aleutians West Census Area | Relatively Low | $5.6 million |
| 7 | Southeast Fairbanks Census Area | Relatively Low | $2.0 million |
| 8 | Sitka City and Borough | Relatively Low | $2.2 million |
| 9 | Chugach Census Area | Relatively Low | $2.7 million |
| 10 | Juneau City and Borough | Relatively Low | $2.0 million |
Every Alaska county, highest overall risk first
30| # | County | Overall risk | Score | Loss a year | Top hazard | Declarations | Tornadoes |
|---|---|---|---|---|---|---|---|
| 1 | Anchorage Municipality | Relatively High | 97.4 | $367 million | Earthquake | 5 | 0 |
| 2 | Matanuska-Susitna Borough | Relatively Moderate | 93.3 | $161 million | Avalanche | 18 | 0 |
| 3 | Kenai Peninsula Borough | Relatively Moderate | 93.0 | $121 million | Avalanche | 18 | 0 |
| 4 | Fairbanks North Star Borough | Relatively Moderate | 88.5 | $101 million | Landslide | 14 | 0 |
| 5 | Aleutians West Census Area | Relatively Low | 67.3 | $29 million | Volcanic activity | 4 | 0 |
| 6 | Kodiak Island Borough | Relatively Low | 65.1 | $25 million | Landslide | 5 | 0 |
| 7 | Yukon-Koyukuk Census Area | Relatively Low | 61.5 | $12 million | Cold wave | 17 | 0 |
| 8 | Kusilvak Census Area | Relatively Low | 57.9 | $11 million | Cold wave | 9 | 0 |
| 9 | Southeast Fairbanks Census Area | Relatively Low | 57.0 | $12 million | Wildfire | 11 | 0 |
| 10 | Northwest Arctic Borough | Relatively Low | 54.6 | $9.9 million | Cold wave | 5 | 0 |
| 11 | Bethel Census Area | Relatively Low | 44.3 | $8.3 million | Cold wave | 18 | 0 |
| 12 | Copper River Census Area | Very Low | 39.9 | $8.0 million | Avalanche | 7 | 0 |
| 13 | Dillingham Census Area | Very Low | 35.7 | $6.7 million | Cold wave | 4 | 0 |
| 14 | Nome Census Area | Very Low | 34.1 | $6.2 million | Cold wave | 9 | 0 |
| 15 | Denali Borough | Very Low | 28.3 | $11 million | Avalanche | 8 | 0 |
| 16 | Sitka City and Borough | Very Low | 23.8 | $7.3 million | Landslide | 0 | 0 |
| 17 | Aleutians East Borough | Very Low | 21.3 | $4.1 million | Volcanic activity | 1 | 0 |
| 18 | Chugach Census Area | Very Low | 19.6 | $9.7 million | Landslide | 7 | 0 |
| 19 | Petersburg Borough | Very Low | 15.4 | $5.1 million | Landslide | 1 | 0 |
| 20 | North Slope Borough | Very Low | 14.8 | $4.9 million | Cold wave | 6 | 0 |
| 21 | Hoonah-Angoon Census Area | Very Low | 14.3 | $3.3 million | Landslide | 0 | 0 |
| 22 | Juneau City and Borough | Very Low | 11.5 | $6.0 million | Landslide | 2 | 0 |
| 23 | Lake and Peninsula Borough | Very Low | 6.3 | $2.0 million | Volcanic activity | 1 | 0 |
| 24 | Haines Borough | Very Low | 4.3 | $2.6 million | Landslide | 1 | 0 |
| 25 | Yakutat City and Borough | Very Low | 3.0 | $1.4 million | Landslide | 0 | 0 |
| 26 | Ketchikan Gateway Borough | Very Low | 1.7 | $1.9 million | Landslide | 1 | 0 |
| 27 | Bristol Bay Borough | Very Low | 1.2 | $1.4 million | Earthquake | 2 | 0 |
| 28 | Prince of Wales-Hyder Census Area | Very Low | 1.0 | $838,639 | Landslide | 1 | 0 |
| 29 | Skagway Municipality | Very Low | 0.5 | $674,575 | Landslide | 1 | 0 |
| 30 | Wrangell City and Borough | Very Low | 0.1 | $171,718 | Landslide | 2 | 0 |
Score: FEMA's national percentile (higher = more risk). Declarations: federal declarations that named the county since 1953, not counting COVID-19. Tornadoes: NOAA SPC tornadoes that touched the county, 1950–2025.
Latest federal declarations in Alaska
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What this page shows, and what it misses
FEMA's National Risk Index compares every US county with every other for 18 natural hazards, combining expected losses with social vulnerability and community resilience. It is a planning-level estimate for nationwide comparison, not a flood-zone map and not the risk to any one property — for flood zones use FEMA's Flood Map Service Center ↗. Federal declarations exclude state declarations and SBA or USDA designations.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Alaska
Which county in Alaska has the highest natural disaster risk?
Of Alaska's 30 counties, 0 have a Very High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025); the highest is Anchorage Municipality (score 97.4 of 100), and expected losses across the state total $941 million a year.
Which Alaska counties are most at risk from tornadoes?
By FEMA's National Risk Index tornado risk score: Bethel Census Area, Aleutians East Borough, Kusilvak Census Area. These are planning-level estimates for whole counties, not maps of individual properties.
Which Alaska counties are most at risk from inland flooding?
By FEMA's National Risk Index inland flooding risk score: Matanuska-Susitna Borough, Fairbanks North Star Borough, Kenai Peninsula Borough. These are planning-level estimates for whole counties, not maps of individual properties.
How many FEMA disaster declarations has Alaska had?
OpenFEMA lists 93 federal disaster, emergency and fire management declarations for Alaska since 1953 (not counting COVID-19); the latest is FM-5672-AK, Mukluk Fire, declared 18 August 2026.