Natural Disaster Risk in Grantham

Natural Hazard Profile: Grantham, New Hampshire

Located along the northeastern Atlantic Seaboard in Sullivan County, Grantham is a town of roughly 3,509 residents. The humid continental climate that characterizes this part of New Hampshire — marked by long, cold winters and brief, warm summers — directly influences the types and severity of natural hazards present, making Grantham a community where hazard awareness has real practical value.

FEMA rates Grantham's composite natural disaster risk at 5.1 out of 10 — moderate risk. Avalanche risk is the dominant natural hazard, with steep mountain terrain and heavy seasonal snowpack creating conditions for dangerous snow slides in and around the area. Residents should also account for landslide and hurricane risk in their preparedness planning.

Relative to other U.S. communities, Grantham's natural disaster risk is above the U.S. national average of 4.5/10, slightly below the 6.2/10 state average. The hazard distribution here is led by avalanche and landslide, as measured by FEMA across Sullivan County. While city-specific sub-county variation exists, these scores represent the best available federal risk estimate.

With a moderate risk rating, Grantham residents are well-served by maintaining standard preparedness practices — an emergency supply kit, awareness of local hazard seasonality, and insurance that covers the top local risks. Periodic review of coverage for avalanche is recommended.