Natural Disaster Risk in Petersburg County

Natural Hazard Profile: Petersburg County, Alaska

Petersburg County, in Alaska, the northernmost U.S. state in Alaska, is characterized by its subarctic climate — subarctic conditions with extreme cold winters and brief summers. The county faces severe winter storms, and its FEMA risk assessment establishes the hazard baseline shared by all the towns and cities it contains.

According to FEMA's National Risk Index, Petersburg County carries an overall risk score of 3.7/10, placing it in the low category. Landslide and debris flow risk tops the local hazard profile, with steep terrain and periodic heavy rainfall creating conditions for rapid slope failure in vulnerable areas. The area also faces notable exposure to avalanche and volcano.

Within Alaska, Petersburg County's risk is, slightly below the 4.6/10 state average. Nationally, it ranks below the U.S. national average of 4.5/10. FEMA's analysis of Petersburg County identifies landslide as the foremost hazard, followed by avalanche and volcano. These rankings reflect the relative frequency and severity of each hazard type in the local environment.

Petersburg County carries a below-average natural disaster risk, reflecting fewer and less severe hazard exposures than typical U.S. communities. Even so, the area's primary risk — landslide — warrants awareness and appropriate insurance coverage, as lower risk does not mean zero risk.