Alaska ice storm risk

30 counties scored 0 rated Very High

Fairbanks North Star Borough has the highest ice storm risk in Alaska, scoring 35.8 out of 100 — rated "Relatively Low" by FEMA's National Risk Index.

#	County	NRI score	Rating
1	Fairbanks North Star Borough	35.8	Relatively Low
2	Kenai Peninsula Borough	25	Very Low
3	Sitka City and Borough	23	Very Low
4	Anchorage Municipality	22.5	Very Low
5	Ketchikan Gateway Borough	19.4	Very Low
6	Yukon-Koyukuk Census Area	19.4	Very Low
7	Prince of Wales-Hyder Census Area	17.3	Very Low
8	Matanuska-Susitna Borough	17	Very Low
9	Petersburg Borough	14.4	Very Low
10	Juneau City and Borough	14.2	Very Low
11	Southeast Fairbanks Census Area	11.9	Very Low
12	Nome Census Area	9.4	Very Low
13	Wrangell City and Borough	7.6	Very Low
14	North Slope Borough	6.8	Very Low
15	Kodiak Island Borough	6.6	Very Low
16	Northwest Arctic Borough	6.6	Very Low
17	Kusilvak Census Area	5.6	Very Low
18	Bethel Census Area	4.8	Very Low
19	Aleutians West Census Area	4.5	Very Low
20	Hoonah-Angoon Census Area	3.4	Very Low
21	Aleutians East Borough	3.1	Very Low
22	Haines Borough	2.8	Very Low
23	Denali Borough	2.4	Very Low
24	Skagway Municipality	1.6	Very Low
25	Dillingham Census Area	1.4	Very Low
26	Lake and Peninsula Borough	1	Very Low
27	Chugach Census Area	0.9	Very Low
28	Copper River Census Area	0.5	Very Low
29	Bristol Bay Borough	0.1	Very Low
30	Yakutat City and Borough	0.1	Very Low

Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.

Ice Storm risk nationally:

Top 50 US counties

Other hazard risks in Alaska:

Wildfire Inland Flooding Coastal Flooding Earthquake Heat Wave Tornado Hurricane Hail Strong Wind Winter Weather Cold Wave Lightning Drought Landslide Avalanche Tsunami Volcanic Activity

Frequently asked questions

What is the highest ice storm risk county in Alaska?

Fairbanks North Star Borough, AK has the highest ice storm risk in Alaska, with a FEMA National Risk Index score of 35.8 out of 100 (rated "Relatively Low").

What causes ice storm risk in Alaska?

Ice storm risk covers damaging freezing rain and sleet accumulation, which collapses power lines, trees, and structures. The highest-risk counties cluster in a band from eastern Texas and Arkansas through the Carolinas and New England, where warm Gulf moisture overruns cold arctic air most frequently. Ice storms cause catastrophic and long-lasting power outages. Ice storm and sleet events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.