Chugach Census Area, Alaska: Natural Disaster Risk and History
Chugach Census Area, Alaska has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 19.6 out of 100, higher than about 19% of US counties, with landslides, avalanches and earthquakes scoring highest of its 18 hazards and $9.7 million a year in expected losses.
OpenFEMA lists 7 federal disaster declarations that included Chugach Census Area since 1986, not counting 2 for COVID-19; the latest is DR-4094-AK (Severe Storm, Straight-Line Winds, Flooding, and Landslides, declared 27 November 2012). NOAA's Storm Prediction Center has no tornado on record touching Chugach Census Area from 1950 to 2025.
Live weather alerts for Alaska All official warnings Latest FEMA declarations
Population 7,011 Buildings worth $945 million Area 15,296 sq mi Risk rank in Alaska 18 of 30 FIPS 02063
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Landslide | Relatively Moderate | 97.1 | $395,694 | about 77 a year | — |
| Avalanche | Very High | 94.7 | $4.9 million | about once every 1.3 years | 23 |
| Earthquake | Relatively Low | 81.8 | $2.7 million | about once every 7.6 years | — |
| Cold wave | Relatively Low | 45.8 | $1.1 million | about 1.6 a year | 20 |
| Winter weather | Relatively Low | 30.6 | $41,335 | about 7.5 a year | 96 |
| Tsunami | Very Low | 24.6 | $306,656 | about once every 3.3 years | 67 |
| Coastal flooding | Very Low | 20.8 | $558 | about once every 83 years | — |
| Wildfire | Very Low | 1.3 | $694 | rarer than once in 1,000 years | — |
| Lightning | Very Low | 1.1 | $6,311 | about 4.5 a year | 11,206 strikes |
| Ice storm | Very Low | 0.9 | $504 | about once every 67 years | 0 |
| Inland flooding | Very Low | 0.8 | $266,092 | about once every 100 years | 0 |
| Hail | Very Low | 0.7 | $16 | about once every 690 years | 0.1 |
| Tornado | Very Low | 0.1 | — | rarer than once in 1,000 years | 0 |
| Drought | No Rating | 0.0 | — | — | 0 |
| Strong wind | No Rating | 0.0 | — | — | 0 |
| Volcanic activity | No Rating | 0.0 | — | about once every 95 years | 0 |
| Heat wave | Insufficient Data | — | — | — | — |
| Hurricane | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 7
Most common: Severe Storm 4, Earthquake 1, Freezing 1, Flood 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1980s | 2 | Freezing, Flood |
| 2000s | 4 | Severe Storm ×3, Earthquake |
| 2010s | 1 | Severe Storm |
The last 7
Widest declarations that included Chugach Census Area
- Severe Winter Storms and Avalanches (2000, DR-1316-AK): 15 Alaska counties designated.
- Severe Freezing (1989, DR-826-AK): 11 Alaska counties designated.
- Earthquake (2002, DR-1440-AK): 7 Alaska counties designated.
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Alaska also had 24 statewide declarations with no county list.
Tornado record since 1950 0
No tornado in NOAA's Storm Prediction Center record touched Chugach Census Area between 1950 and 2025. That does not mean one cannot happen.
How Chugach Census Area compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Chugach Census Area (this page) | — | Very Low | 19.6 | Landslide |
| Copper River Census Area | 160 km | Very Low | 39.9 | Avalanche |
| Anchorage Municipality | 187 km | Relatively High | 97.4 | Earthquake |
| Matanuska-Susitna Borough | 268 km | Relatively Moderate | 93.3 | Avalanche |
| Yakutat City and Borough | 310 km | Very Low | 3.0 | Landslide |
| Kenai Peninsula Borough | 322 km | Relatively Moderate | 93.0 | Avalanche |
Nearest by distance between county centres. Every county in Alaska, ranked.
Vulnerability and resilience
| Social vulnerability | Very Low 10.6 |
|---|---|
| Community resilience | Relatively Low 24.1 |
| Community risk factor | 0.77 |
| Expected annual loss, all hazards | $9.7 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Chugach Census Area's main hazards
- Right now: National Weather Service alerts for Alaska · all official warnings on Global Incident Tracker.
- Landslide: Landslides recorded
- Avalanche: Official warnings now
- Earthquake: Earthquakes today · Earthquake safety guide
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
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 Chugach Census Area
What natural disasters is Chugach Census Area, Alaska most at risk from?
Chugach Census Area, Alaska has a Very Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 19.6 out of 100, higher than about 19% of US counties, with landslides, avalanches and earthquakes scoring highest of its 18 hazards and $9.7 million a year in expected losses.
How many federal disaster declarations has Chugach Census Area had?
OpenFEMA lists 7 federal disaster declarations that included Chugach Census Area since 1986, not counting 2 for COVID-19; the latest is DR-4094-AK (Severe Storm, Straight-Line Winds, Flooding, and Landslides, declared 27 November 2012). Another 24 Alaska declarations were made statewide without a county list.
How many tornadoes have hit Chugach Census Area?
NOAA's Storm Prediction Center has no tornado on record touching Chugach Census Area from 1950 to 2025.
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.