Natural disaster risk in Petersburg Borough, Alaska
Alaska · population 3,393 · FIPS 02195
Overall: very low risk
Petersburg Borough has a composite risk score of 15.4 out of 100 — higher than 15% of US counties. It ranks 19 of 30 in Alaska (1 = highest risk). Its highest-rated hazards are landslide, avalanche, volcanic activity.
Drought now: No, but abnormally dry (D0)
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 94.47% of Petersburg Borough is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 11 weeks in a row.
Drought in Petersburg Borough: the last 52 weeks · droughtmonitor.unl.edu
The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Risk, loss, vulnerability and resilience
| Measure | Rating and score |
|---|---|
| Overall risk Expected annual loss, adjusted for social vulnerability and community resilience. |
Very low 15.4 |
| Expected annual loss About $5.1 million a year, on average, across all 18 hazards. |
Very low 13.5 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively moderate 59.5 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Very low 18.7 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Petersburg Borough, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Landslide | Relatively high 99 |
| Avalanche | Relatively high 92 |
| Volcanic activity | Relatively low 86 |
| Winter weather | Relatively low 30 |
| Earthquake | Very low 18 |
| Ice storm | Very low 14 |
| Cold wave | Very low 4 |
| Wildfire | Very low 3 |
| Lightning | Very low 0 |
| Inland (riverine) flooding | Very low 0 |
| Tornado | Very low 0 |
| Coastal flooding | No rating |
| Drought | No rating |
| Hail | No rating |
| Heat wave | Insufficient data |
| Hurricane | Not applicable |
| Strong wind | No rating |
| Tsunami | Insufficient data |
FEMA disaster declarations for Petersburg Borough
Federal declarations that designated Petersburg Borough, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Not since 1 Jan 2024: no FEMA disaster declaration in the records this site read names Petersburg Borough.
All FEMA declarations in Alaska, with estimated apply-by dates · Open FEMA deadlines
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). Dataset: Disaster Declarations Summaries - v2.
How to read these ratings
- Ratings run in five steps: very low, relatively low, relatively moderate, relatively high and very high. They compare a county with every other US county; they are not a measure of danger on their own.
- Scores run from 0 to 100 and are national percentiles. The bar shows the score: a score of 80 means a higher value than 80% of US counties.
- Overall risk combines the expected annual loss with social vulnerability and community resilience.
- Expected annual loss is the average yearly loss to buildings, people and agriculture the model expects from all 18 hazards.
- Social vulnerability describes how hard it may be for people to prepare for and recover from a disaster. Higher is worse.
- Community resilience describes a community's ability to prepare, adapt and recover. Higher is better.
- "Not applicable" means FEMA does not model that hazard there (for example, hurricanes far inland).
About this data
Source: FEMA National Risk Index, version 1.20, released December 2025, published by the Federal Emergency Management Agency (US public domain). About the National Risk Index. The index is a model of relative risk built from historical hazard records, what is exposed and community factors. It is not a forecast, it does not describe any single property, and it is not insurance or financial advice. For decisions about a specific address, check FEMA's flood maps and your local emergency management office.
Questions
What is the natural disaster risk in Petersburg Borough, Alaska?
FEMA's National Risk Index rates the overall risk in Petersburg Borough as very low, with a score of 15.4 out of 100 (higher than 15% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Petersburg Borough?
The hazards rated highest for Petersburg Borough are landslide (relatively high), avalanche (relatively high), volcanic activity (relatively low).
What is the flood risk in Petersburg Borough?
FEMA rates inland (river and rain) flooding risk in Petersburg Borough as very low. For a specific property, check the FEMA flood map and your local floodplain office.
Has Petersburg Borough had a FEMA disaster declaration?
Not since 1 Jan 2024: no FEMA disaster declaration in the records this site read names Petersburg Borough.
Is Petersburg Borough in a drought?
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 94.47% of Petersburg Borough is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 11 weeks in a row.
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