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Flood zone · Washington

Flood zone in Washington

Flood zone (FEMA NFHL) data for ZIP codes in Washington. Pick a ZIP below to dive into the flood zone summary.

Last verified 2026-05-13 · methodology

What lands here

Pages show the flood zone code, what it means in plain English (1% annual chance zone, 0.2% annual chance zone, or outside mapped hazard), and the base flood elevation where assigned.

Source & refresh

FEMA NFHL. Refreshed quarterly loma updates. Primary source →

Washington top concern

Wildfire (eastern), Cascadia seismic, coastal flood

Washington's wildfire risk concentrates in eastern WA + the Cascades. Cascadia subduction zone shapes long-term seismic risk. Puget Sound coastal flood zones face Risk Rating 2.0 pressure. Seattle has documented LCRR lead-service-line obligations.

See Washington state page for the full state-level rollup across all 12 dimensions.

Read more on flood zone

Editorial deep-dives explaining the source data, its limits, and how to read it.

9 Washington ZIPs