Natural disaster risk in Grafton County, New Hampshire
New Hampshire · population 91,072 · FIPS 33009
Overall: relatively moderate risk
Grafton County has a composite risk score of 81.8 out of 100 — higher than 81% of US counties. It ranks 3 of 10 in New Hampshire (1 = highest risk). Its highest-rated hazards are winter weather, landslide, inland (riverine) flooding.
Drought now: Yes: D1 Moderate Drought, 6 weeks
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 71.32% of Grafton County is in D1 Moderate Drought. Some of it has been at D1 or worse for 6 weeks in a row.
Drought in Grafton 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 moderate 81.8 |
| Expected annual loss About $50.4 million a year, on average, across all 18 hazards. |
Relatively low 83.9 |
| Social vulnerability Higher means people may find it harder to prepare and recover. |
Relatively low 27.4 |
| Community resilience Higher means a stronger ability to prepare, adapt and recover. |
Relatively high 72.7 |
Risk by hazard
FEMA's risk rating for each of 18 natural hazards in Grafton County, highest first. "Not applicable" means the hazard is not modelled here.
| Hazard | Risk rating and score |
|---|---|
| Winter weather | Relatively high 93 |
| Landslide | Relatively moderate 97 |
| Inland (riverine) flooding | Relatively moderate 90 |
| Lightning | Relatively moderate 80 |
| Ice storm | Relatively moderate 75 |
| Hurricane | Relatively low 78 |
| Avalanche | Relatively low 74 |
| Earthquake | Relatively low 69 |
| Cold wave | Relatively low 54 |
| Strong wind | Relatively low 48 |
| Heat wave | Relatively low 44 |
| Wildfire | Very low 30 |
| Tornado | Very low 24 |
| Hail | Very low 19 |
| Coastal flooding | Not applicable |
| Drought | No rating |
| Tsunami | Not applicable |
| Volcanic activity | Not applicable |
FEMA disaster declarations for Grafton County
Federal declarations that designated Grafton County, since 1 Jan 2024 (the period this site keeps from OpenFEMA). Older declarations are in FEMA's own dataset.
Yes. Grafton County has been named in 4 FEMA declarations since 1 Jan 2024. The latest is DR-4812-NH (Severe Storm and Flooding), declared 20 Aug 2024.
| Declaration | Kind | Incident | Declared | Individual assistance here |
|---|---|---|---|---|
| DR-4812-NH | Major disaster | Severe Storm and Flooding | 20 Aug 2024 | No |
| DR-4799-NH | Major disaster | Severe Winter Storm and Flooding | 10 Jul 2024 | No |
| DR-4771-NH | Major disaster | Severe Storms and Flooding | 19 Apr 2024 | No |
| DR-4761-NH | Major disaster | Severe Storm and Flooding | 27 Feb 2024 | No |
All FEMA declarations in New Hampshire, 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 Grafton County, New Hampshire?
FEMA's National Risk Index rates the overall risk in Grafton County as relatively moderate, with a score of 81.8 out of 100 (higher than 81% of US counties). That is a comparison with other US counties, not a forecast.
What are the biggest natural hazards in Grafton County?
The hazards rated highest for Grafton County are winter weather (relatively high), landslide (relatively moderate), inland (riverine) flooding (relatively moderate).
What is the flood risk in Grafton County?
FEMA rates inland (river and rain) flooding risk in Grafton County as relatively moderate. For a specific property, check the FEMA flood map and your local floodplain office.
Has Grafton County had a FEMA disaster declaration?
Yes. Grafton County has been named in 4 FEMA declarations since 1 Jan 2024. The latest is DR-4812-NH (Severe Storm and Flooding), declared 20 Aug 2024.
Is Grafton County in a drought?
Yes. On the U.S. Drought Monitor map valid 13 October 2026, 71.32% of Grafton County is in D1 Moderate Drought. Some of it has been at D1 or worse for 6 weeks in a row.
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