Enter any Massachusetts address to see its FEMA flood zone designation
Massachusetts faces a mixed flood risk profile, with floods, flash floods, and coastal floods being the most frequent event types over the last 30 years. Floods occurred 1013 times, flash floods 605 times, and coastal floods 372 times. Tropical storms and storm surge/tide events also contribute to the state's flood hazards.
Recent federal disaster declarations highlight the impact of hurricanes, such as Hurricane Lee in September 2023, which can bring significant rainfall and coastal impacts to Massachusetts. While the data does not specify regional differences within the state, the prevalence of coastal flood events suggests a notable risk along the coastline, while inland areas may be more susceptible to riverine and flash flooding.
The National Flood Insurance Program (NFIP) data indicates that Zone A, typically representing areas with a higher flood risk, has the highest number of claims and the largest total payout. However, a significant number of claims also originate from zones categorized as UNKNOWN or X, suggesting that properties outside of high-risk zones can still experience flood damage and may require insurance. The average claim amount in Zone V, another high-risk zone, is the highest among the specified categories.
Summary generated from FEMA disaster declarations, NOAA storm events, and NFIP claim data. Updated quarterly.
Source: OpenFEMA NFIP Claims, Policies, and Disaster Declarations data.
Massachusetts has received 414 federal disaster declarations, including 60 flood and coastal storm declarations and 41 hurricane declarations.
FEMA designates flood zones across Massachusetts using the following classifications:
AE High Risk — 1% annual chance of flooding (100-year floodplain). Insurance required for federal mortgages.
VE Very High Risk — Coastal flooding with wave action. Strictest building codes.
X (Shaded) Moderate Risk — 500-year floodplain. Insurance recommended.
X Low Risk — Outside major floodplains. Insurance optional but advisable — from 2014 to 2024, nearly one-third of NFIP claims came from outside high-risk zones.
Properties in Massachusetts FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance through the National Flood Insurance Program (NFIP).
The average NFIP premium in Massachusetts is approximately $1,243 per year. Rates vary significantly based on flood zone, building elevation, and coverage amount.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from properties outside the high-risk Special Flood Hazard Area. Massachusetts residents can purchase flood insurance through the NFIP or private insurers.
Visit FloodSmart.gov to find an agent and get a quote.
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