Oswego County
New York — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 68th
Oswego County faces low composite natural disaster risk (NRI Risk Index score 67.6, 68th national percentile), driven primarily by winter weather and ice storm exposure. Expected annual loss across all 18 hazard types is $27M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Winter Weather | High | 46.74 / yr | $564K |
| Ice Storm | High | 1.39 / yr | $558K |
| Riverine Flood | Medium | 0.86 / yr | $22M |
| Strong Wind | Medium | 1.23 / yr | $905K |
| Earthquake | Low | 0.00 / yr | $617K |
| Lightning | Medium | 28.55 / yr | $381K |
| Hurricane | Low | 0.01 / yr | $223K |
| Heat Wave | Low | 2.89 / yr | $334K |
| Landslide | Very Low | 0.38 / yr | $837 |
| Tornado | Low | 0.16 / yr | $973K |
| Wildfire | Very Low | 0.00 / yr | $20K |
| Coastal Flood | Very Low | 0.01 / yr | $8K |
| Hail | Very Low | 1.48 / yr | $89K |
| Cold Wave | Very Low | 4.26 / yr | $284K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Oswego County?
Oswego County has a composite FEMA National Risk Index score of 67.6 out of 100, placing it in the Low category and the 68th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Oswego County?
The three highest-rated hazards are Winter Weather (High, $564K EAL), Ice Storm (High, $558K EAL), Riverine Flood (Medium, $22M EAL). These account for most of the county's expected annual losses.
How does Oswego County compare to other New York counties?
Oswego County ranks #36 of 62 New York counties for overall natural disaster risk, with a low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Oswego County's $27M EAL is a statistical average, not a guarantee for any specific year or address.