FEMA NRI 1.19.0Updated Nov 2023 · Coverage 2014–2023Methodology

Alaska Disaster Risk

Natural disaster risk data for all 30 counties.

Avg FEMA Rating

Very Low

Avg Percentile

35th

Counties with Data

of 30 total

County risk atlas

Alaska hazard exposure by county

A compact 2.5D surface of FEMA National Risk Index percentiles. Toggle composite, flood, wildfire, hurricane, tornado, and earthquake risk to see which counties carry the highest relative exposure without loading the full national explorer dataset.

Counties

30/30

Avg composite

35th

Risk layers

Highest Risk Counties

Anchorage Municipality

Relatively High

97th percentile

Matanuska-Susitna Borough

Relatively Moderate

93th percentile

Kenai Peninsula Borough

Relatively Moderate

93th percentile

Fairbanks North Star Borough

Relatively Moderate

89th percentile

Aleutians West Census Area

Relatively Low

67th percentile

Lowest Risk Counties

Wrangell City and Borough

Very Low

0th percentile

Skagway Municipality

Very Low

0th percentile

Prince of Wales-Hyder Census Area

Very Low

1th percentile

Bristol Bay Borough

Very Low

1th percentile

Ketchikan Gateway Borough

Very Low

2th percentile

All Alaska Counties

County	Percentile	FEMA Rating	Flood	Wildfire	Tornado	Earthquake
Anchorage Municipality	97th	Relatively High	28.0	78.6	0.4	99.5
Matanuska-Susitna Borough	93th	Relatively Moderate	51.3	94.7	0.9	98.9
Kenai Peninsula Borough	93th	Relatively Moderate	43.8	97.1	0.8	98.7
Fairbanks North Star Borough	89th	Relatively Moderate	45.7	97.6	0.7	97.6
Aleutians West Census Area	67th	Relatively Low	0.0	0.0	0.6	89.7
Kodiak Island Borough	65th	Relatively Low	4.4	23.2	0.5	94.7
Yukon-Koyukuk Census Area	62th	Relatively Low	6.6	93.0	0.7	75.3
Kusilvak Census Area	58th	Relatively Low	0.0	46.9	0.9	24.6
Southeast Fairbanks Census Area	57th	Relatively Low	9.4	97.1	0.8	86.5
Northwest Arctic Borough	55th	Relatively Low	3.4	65.7	0.5	65.7
Bethel Census Area	44th	Relatively Low	9.6	83.8	1.4	49.4
Copper River Census Area	40th	Very Low	1.9	83.7	0.4	77.8
Dillingham Census Area	36th	Very Low	3.1	62.2	0.6	75.0
Nome Census Area	34th	Very Low	5.7	45.2	0.5	73.5
Denali Borough	28th	Very Low	1.5	84.8	0.3	78.9
Sitka City and Borough	24th	Very Low	34.0	8.7	0.1	83.9
Aleutians East Borough	21th	Very Low	0.0	0.1	1.0	74.6
Chugach Census Area	20th	Very Low	20.8	1.3	0.1	81.8
Petersburg Borough	15th	Very Low	1.0	3.4	0.3	18.3
North Slope Borough	15th	Very Low	2.6	11.4	0.7	50.2
Hoonah-Angoon Census Area	14th	Very Low	22.8	5.6	0.4	73.2
Juneau City and Borough	12th	Very Low	38.0	19.5	0.6	80.5
Lake and Peninsula Borough	6th	Very Low	0.2	45.5	0.8	79.7
Haines Borough	4th	Very Low	0.8	5.0	0.2	64.5
Yakutat City and Borough	3th	Very Low	0.3	1.7	0.2	77.4
Ketchikan Gateway Borough	2th	Very Low	26.0	10.9	0.2	31.2
Bristol Bay Borough	1th	Very Low	0.0	34.2	0.3	71.9
Prince of Wales-Hyder Census Area	1th	Very Low	3.8	10.1	0.3	43.0
Skagway Municipality	0th	Very Low	0.3	2.4	0.0	43.9
Wrangell City and Borough	0th	Very Low	0.4	1.5	0.1	13.0

Frequently Asked Questions

Which county in Alaska has the highest natural disaster risk?

Anchorage Municipality has the highest natural disaster risk in Alaska, rated Relatively High (97th percentile nationally), based on FEMA National Risk Index data.

Which county in Alaska is the safest from natural disasters?

Wrangell City and Borough has the lowest natural disaster risk in Alaska, rated Very Low (0th percentile nationally), based on FEMA NRI data.

What natural disasters are most common in Alaska?

Alaska counties face varying levels of risk from floods, wildfires, tornadoes, earthquakes, and hurricanes. The FEMA National Risk Index scores each county across 18 hazard types. See individual county pages for detailed hazard breakdowns.

How is natural disaster risk measured by county?

The FEMA National Risk Index (NRI) measures natural disaster risk using expected annual loss, social vulnerability, and community resilience. Scores are normalized nationally, with ratings from Very Low to Very High across 18 natural hazard types.

Prepare your household for natural disasters

FEMA's Ready.gov provides county-specific preparedness checklists and emergency planning guides.

FEMA Ready Guide →

Data Source

Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.

Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.

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