Anchorage Municipality Disaster Risk

Anchorage Municipality has a FEMA National Risk Index rating of Relatively High, placing it in the 97th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.

Anchorage Municipality is evaluated for five major natural hazard types: earthquake (99th percentile), wildfire (79th percentile), flooding (28th percentile), tornado (0th percentile). The highest-risk hazard is earthquake at the 99th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.

Anchorage Municipality's composite risk percentile is 97th, compared to the Alaska state average of 35th percentile. The state's overall risk rating is Very Low. This means Anchorage Municipality faces higher natural disaster risk than the typical county in Alaska.

Yes, Anchorage Municipality's earthquake risk is at the 99th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Anchorage Municipality is at the 28th percentile.

FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.

Anchorage Municipality's composite risk score of 97th percentile is above the Alaska state average of 35th percentile. This elevated risk is driven by earthquake exposure (99th percentile), along with wildfire risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.