Natural disaster risk in St. Lawrence County, New York
New York · population 108,366 · FIPS 36089
Overall: relatively low risk
St. Lawrence County has a composite risk score of 77.9 out of 100 — higher than 77% of US counties. It ranks 25 of 62 in New York (1 = highest risk). Its highest-rated hazards are ice storm, winter weather, cold wave.
Drought now: No, but abnormally dry (D0)
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 11.2% of St. Lawrence County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 7 weeks in a row.
Drought in St. Lawrence County: 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. |
Relatively low 77.9 |
| Expected annual loss About $31.9 million a year, on average, across all 18 hazards. |
Relatively low 74.2 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively high 64.7 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Relatively high 70.4 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in St. Lawrence County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Ice storm | Relatively high 87 |
| Winter weather | Relatively high 87 |
| Cold wave | Relatively moderate 88 |
| Inland (riverine) flooding | Relatively moderate 84 |
| Lightning | Relatively moderate 77 |
| Earthquake | Relatively low 86 |
| Landslide | Relatively low 77 |
| Hurricane | Relatively low 59 |
| Strong wind | Relatively low 35 |
| Heat wave | Very low 37 |
| Wildfire | Very low 33 |
| Tornado | Very low 24 |
| Avalanche | Very low 17 |
| Hail | Very low 3 |
| Coastal flooding | Not applicable |
| Drought | No rating |
| Tsunami | Not applicable |
| Volcanic activity | Not applicable |
FEMA disaster declarations for St. Lawrence County
Federal declarations that designated St. Lawrence County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. St. Lawrence County has been named in 2 FEMA declarations since 1 Jan 2024. The latest is DR-4825-NY (Remnants of Tropical Storm Debby), declared 24 Sep 2024.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| DR-4825-NY | Major disaster | Remnants of Tropical Storm Debby | 24 Sep 2024 | No |
| DR-4814-NY | Major disaster | Severe Storm, Tornadoes, and Flooding | 29 Aug 2024 | No |
All FEMA declarations in New York, 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 St. Lawrence County, New York?
FEMA's National Risk Index rates the overall risk in St. Lawrence County as relatively low, with a score of 77.9 out of 100 (higher than 77% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in St. Lawrence County?
The hazards rated highest for St. Lawrence County are ice storm (relatively high), winter weather (relatively high), cold wave (relatively moderate).
What is the flood risk in St. Lawrence County?
FEMA rates inland (river and rain) flooding risk in St. Lawrence County as relatively moderate. For a specific property, check the FEMA flood map and your local floodplain office.
Has St. Lawrence County had a FEMA disaster declaration?
Yes. St. Lawrence County has been named in 2 FEMA declarations since 1 Jan 2024. The latest is DR-4825-NY (Remnants of Tropical Storm Debby), declared 24 Sep 2024.
Is St. Lawrence County in a drought?
No drought, but abnormally dry. On the U.S. Drought Monitor map valid 13 October 2026, 11.2% of St. Lawrence County is D0 Abnormally Dry and none of it is in drought (D1 to D4). Some of it has been abnormally dry or worse for 7 weeks in a row.
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