FEMA flood zones · Massachusetts

Barnstable County, Massachusetts Flood Zone Map

3,184 flood insurance claims·$42.9M paid·7 federal flood & hurricane disasters

24% of Barnstable County’s area is in FEMA’s high-risk flood zones, and another 4% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Barnstable County, Massachusetts. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.

How Barnstable County floods

General flood and coastal flood events dominate the hazard profile of Barnstable County, backed by 36 standard flood events and 33 coastal flood events recorded over the last 30 years by the NOAA Storm Events Database, alongside tropical storms, flash floods, and storm surges.

Recent conditions illustrate these recurrent coastal impacts. A strong Nor'easter in April 2024 brought heavy rainfall and minor to moderate coastal flooding along the east coast of Massachusetts. Earlier that year, low-pressure systems in January 2024 produced strong southeast winds, rain, and widespread coastal flooding affecting both the south and east coasts of the region.

Property owners in high-risk zones should pay the closest attention to these flood dynamics. National Flood Insurance Program records show the heaviest claim volumes concentrated in coastal and high-risk areas, led by Zone A with 1,764 claims averaging an 18,064 dollar payout and an average recorded water depth of 6 inches, and Zone V with 712 claims averaging a 25,410 dollar payout and an average recorded water depth of 7 inches. Moderate and minimal hazard zones also experience claims, including Zone X with an average recorded water depth of 8 inches, shaded Zone X with an average depth of 6 inches, and unshaded Zone X with an average depth of 4 inches.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

Where the flood claims came from

14% of Barnstable County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

2,894 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 6 inches.

Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.

Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.

Flood claims, year by year

The worst year was 1991, with 1,362 claims and $19.9M paid, the year of Hurricane Bob and Coastal Storm.

1978: 96 claims1979: 30 claims1980: 7 claims1981: 9 claims1982: 15 claims1983: 33 claims1984: 16 claims1985: 29 claims1986: 3 claims1987: 135 claims1988: 18 claims1989: 7 claims1990: 100 claims1991: 1,362 claims1992: 131 claims1993: 70 claims1994: 5 claims1995: 7 claims1996: 88 claims1997: 26 claims1998: 20 claims1999: 3 claims2000: 6 claims2001: 10 claims2002: 15 claims2003: 16 claims2004: 4 claims2005: 77 claims2006: 37 claims2007: 22 claims2008: 6 claims2009: 18 claims2010: 55 claims2011: 19 claims2012: 34 claims2013: 52 claims2014: 7 claims2015: 59 claims2016: 2 claims2017: 53 claims2018: 294 claims2019: 16 claims2020: 8 claims2021: 24 claims2022: 60 claims2023: 57 claims2024: 12 claims2025: 2 claims2026: 9 claims19801990200020102020

Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.

In their words

61 NOAA storm reports from Barnstable County describe what happened, in the words of the forecasters who covered it. Read the Massachusetts flood stories →

Federal disasters

28 federal disaster declarations since 1972, 7 of them floods, coastal storms or hurricanes.

DisasterBegan
Hurricane LeeSep 15, 2023
Severe Winter Storm And SnowstormJan 28, 2022
Tropical Storm HenriAug 20, 2021
Severe Winter Storm And FloodingMar 2, 2018
Severe Winter Storm, Snowstorm, And FloodingJan 26, 2015
Severe Winter Storm, Snowstorm, And FloodingFeb 8, 2013
Hurricane SandyOct 27, 2012
Tropical Storm IreneAug 27, 2011

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

113 since 1996: 18 flash floods, 36 river or area floods and 39 coastal floods or surges.

EventDateDamage
Coastal FloodJan 13, 2024—
Coastal FloodJan 10, 2024—
Coastal FloodApr 4, 2024—
Tropical StormSep 16, 2023$500
Tropical StormSep 16, 2023$3,000
Tropical StormSep 16, 2023$1,000
Tropical StormSep 16, 2023$800
Tropical StormSep 16, 2023$1,500

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Coastal Flood · Jan 13, 2024. A low pressure system over the southern Plains strengthened significantly as it reached the eastern Great Lakes. This placed New England on the warm side of the storm with strong SE winds and rain instead of snow. This lead to widespread river flooding and coastal flooding on both the south and east coasts of southern New England. The heaviest rain fell over eastern CT, RI, and eastern MA with totals of 1 to 3 inc…

Coastal Flood · Jan 10, 2024. A negatively tilted mid level trough swung through New England while at the surface a low pressure center passed directly over southern New England. This inland runner brought warm air so that all precipitation fell as rain, along with strong winds. There was a good deal of tree damage from the winds and widespread river flooding with many rivers going into major flood stage. Coastal flooding was also a problem. M…

Coastal Flood · Apr 4, 2024. A strong Nor'easter passed offshore of southern New England bringing widespread heavy rainfall, high elevation snow and sleet, as well as strong winds to the region. There was minor flooding on some rivers as well as minor to moderate coastal flooding along the east coast of MA. This was a late season snow storm with very elevation dependent snowfall totals from 0 to over 8 inches. Wind damage was sporadic and mos…

Tropical Storm · Sep 16, 2023. Hurricane Lee passed east of Southern New England during the morning hours moving toward maritime Canada by midday. As it passed by it produced some tropical storm level sustained winds and wind gusts but impact was minimal. There were some downed trees and power lines and the maximum wind gust was 62 mph on the bay side of Cape Cod.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a coastal flood zoneDiagram: land rising away from the shore. The 1%-annual-chance flood surface reaches inland; where storm waves ride on top of it the zone is V or VE, behind that AE, then a band of shaded X, then X on higher ground.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXX shadedAEVE
  1. VE / V Storm waves of 3 feet or more ride on top of the flood. Strictest building rules; homes go up on pilings.
  2. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Barnstable County

If a building in Barnstable County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.

Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.