New Hampshire wildfire risk
New Hampshire sits in the lower half of US states for wildfire hazard, but lower does not mean none — hazard concentrates locally regardless of the statewide picture. This page covers current activity and how to check your own address.
Active fires in New Hampshire
New Hampshire's recorded fire history
Federal perimeter records show only 3 mapped wildfires in New Hampshire since 2000. That is a genuinely low figure, and it is the main reason the state sits where it does in the national ranking. It is worth being careful with what it means, though: the record captures fires large enough to have a perimeter mapped by a federal agency, so smaller incidents handled locally do not appear.
Where hazard concentrates in New Hampshire
Wildfire hazard is not spread evenly across a state. These are the 5 counties in New Hampshire with the highest wildfire risk scores in FEMA's National Risk Index, with the building value each has sitting in exposed areas.
| County | Hazard score | Building exposure |
|---|---|---|
| Hillsborough County | 67.0 | $9.4B |
| Rockingham County | 47.8 | $9.1B |
| Merrimack County | 35.2 | $9.8B |
| Strafford County | 34.5 | $9.0B |
| Carroll County | 33.6 | $12.2B |
Hillsborough County carries the highest score in the state at 67.0. If your address is there, or in any of the counties above, the statewide average understates your situation considerably — which is the reason to check the parcel rather than the state.
How New Hampshire ranks nationally
FEMA's National Risk Index scores every US county for expected annual wildfire loss. Across New Hampshire's 10 assessed counties the average wildfire hazard score is 32.9, which places the state 38th of the 50 states. The most exposed county in New Hampshire scores 67.0.
Against a 50-state average of 52.7, New Hampshire sits 19.8 points below it. Rank 38 of 50. The National Risk Index blends how often wildfire is expected with how much is standing in the way, so a state can post a moderate score with severe local hazard wherever development has pushed into the wildland-urban interface.
Roughly $82.4B of building value sits inside New Hampshire's wildfire-exposed areas. That figure is what drives carrier behaviour: insurers manage concentration of exposure, so a state can have modest average hazard and still see availability problems wherever that value clusters in the wildland-urban interface.
New Hampshire wildfire season
New Hampshire sees most wildfire activity during dry spells in spring and autumn, when cured vegetation and low humidity coincide. Activity is generally episodic rather than a sustained multi-month season.
Insurance in New Hampshire
New Hampshire does not operate a FAIR Plan in the way the western fire states do, which in practice means the surplus lines market is the fallback for a parcel the admitted market declines. An independent broker is more useful here than a captive agent, because only they can access those carriers.
Residual-market availability and the rules governing it change. Confirm the current position with the New Hampshire Department of Insurance before you rely on it.
Whatever the market looks like in your area, the sequence is the same: document mitigation before your renewal date, work with an independent broker who can access surplus lines, and ask directly whether the carrier credits wildfire mitigation. The full fire insurance guide covers non-renewal, FAIR Plans and difference-in-conditions wraps in detail.
Lowering your risk in New Hampshire
The two changes with the best return anywhere in the country are clearing the first five feet around the structure to non-combustible material, and screening vents against ember entry. Both are cheap, both address the mechanism that destroys most homes, and both are visible to an underwriter if you photograph and invoice them. What qualifies and how to document it.