FEMA flood zones · Washington

Island County, Washington Flood Zone Map

279 flood insurance claims·$4.1M paid·5 federal flood & hurricane disasters

9% of Island County’s area is in FEMA’s high-risk flood zones.

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 Island County, Washington. 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.

Where the flood claims came from

4% of Island County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

225 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 10 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 2006, with 46 claims and $580,506 paid, the year of Severe Storms, Flooding, Tidal Surge, Landslides, and Mudslides and Severe Winter Storm, Landslides, and Mudslides.

1979: 5 claims1980: 1 claims1981: 2 claims1982: 5 claims1983: 4 claims1984: 1 claims1989: 1 claims1990: 5 claims1991: 1 claims1992: 2 claims1994: 1 claims1995: 1 claims1996: 14 claims1997: 12 claims1998: 3 claims1999: 12 claims2000: 2 claims2001: 4 claims2003: 2 claims2004: 1 claims2005: 2 claims2006: 46 claims2007: 2 claims2009: 4 claims2010: 4 claims2011: 4 claims2012: 19 claims2013: 2 claims2015: 2 claims2016: 35 claims2018: 7 claims2020: 4 claims2021: 21 claims2022: 38 claims2023: 2 claims2024: 6 claims2025: 2 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

1 NOAA storm reports from Island County describe what happened, in the words of the forecasters who covered it. Read the Washington flood stories →

Federal disasters

21 federal disaster declarations since 1980, 5 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter Storms, Straight-line Winds, Flooding, Landslides, And MudslidesJan 5, 2024
Severe Winter Storm, Straight-line Winds, Flooding, Landslides, And MudslidesNov 3, 2022
Severe Storms, Straight-line Winds, Flooding, Landslides, And MudslidesNov 5, 2021
Severe Winter Storm, Straight-line Winds, Flooding, Landslides, And MudslidesDec 29, 2020
Severe Storms, Flooding, Landslides, And MudslidesJan 20, 2020
Severe Winter Storms, Straight-line Winds, Flooding, Landslides, Mudslides, TornadoDec 10, 2018
Severe Storms, Straight-line Winds, Flooding, Landslides, And MudslidesNov 12, 2015
Severe WindstormAug 29, 2015

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

Recorded flood events

3 since 1996: 1 river or area floods and 2 coastal floods or surges.

EventDateDamage
Storm Surge/TideJan 26, 2012—
Coastal FloodDec 17, 2012$250,000
FloodApr 3, 2009$10,000

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

From the storm reports

Storm Surge/Tide · Jan 26, 2012. High wind occurred in the Admiralty Inlet area. Storm surge destroyed fences and yards in the Sandy point and Admiralty Inlet areas.

Coastal Flood · Dec 17, 2012. High astronomical tides coincided with low pressure to cause record high tide levels throughout Puget Sound. Many homes and yards along the shoreline were flooded.

Flood · Apr 3, 2009. Heavy rain over Whidbey Island, from a stationary Puget Sound convergence zone, caused enough flow on Glendale Creek to burst a beaver dam. Subsequent rain and plugging of a culvert on Glendale Road led to part of the road being washed away. The flood stream eventually damaged about 8 homes.

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 river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. 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.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  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 Island County

If a building in Island 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.