Petersburg Borough, Alaska: hazard risk
FEMA rates Petersburg Borough's overall risk Very Low (score 15.4 of 100, higher than 15% of rated U.S. counties); 2 of its 15 hazards are rated Relatively High or Very High, led by landslide, avalanche. Its storm record holds 397 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Landslide | Relatively High | 99.7 | $3.0M |
| Avalanche | Relatively High | 92.7 | $1.8M |
| Volcanic Activity | Relatively Low | 86.3 | $3K |
| Winter Weather | Relatively Low | 30.9 | $26K |
| Earthquake | Very Low | 18.3 | $20K |
| Ice Storm | Very Low | 14.4 | $8K |
| Cold Wave | Very Low | 4.0 | $6K |
| Wildfire | Very Low | 3.4 | $991 |
| Riverine Flooding | Very Low | 1.0 | $187K |
| Lightning | Very Low | 0.4 | $1K |
| Tornado | Very Low | 0.3 | $0 |
| Coastal Flooding | No Rating | 0.0 | $0 |
| Drought | No Rating | 0.0 | $0 |
| Hail | No Rating | 0.0 | $0 |
| Strong Wind | No Rating | 0.0 | $0 |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Winter storms | 197 | 0 | $527K | 7th of 29 | 2164th of 3,077 |
| High wind and dust storms | 183 | 0 | $1.4M | 9th of 29 | 772nd of 3,080 |
| Extreme cold | 8 | 0 | – | 6th of 29 | 2577th of 3,076 |
| Floods | 4 | 0 | $156K | 7th of 29 | 3038th of 3,080 |
| Landslides and avalanches | 3 | 0 | $613K | 4th of 29 | 341st of 2,278 |
| Wildfires | 2 | 0 | – | 10th of 29 | 1260th of 2,972 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Petersburg Borough record: every hazard by year and month, the deadliest events and FEMA's declarations.