Observed arrival · 2026-09-30
Flood Zone API: FEMA map fields in one lookup
A keyed HTTPS API accepts a U.S. street address or latitude/longitude and returns mapped flood-zone, SFHA, base-flood-elevation, and FIRM-panel data.
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- Developers needing FEMA flood-map lookups
- Worth noticing
- The sample returns an 8-foot BFE in NGVD29 and notes that elevations should be compared using the same vertical datum.
Field notes
The documented call accepts either an address or coordinates and uses a bearer API key; the example resolves a Miami Beach address through the Census geocoder at address-range precision. Its sample payload also records FEMA source layers, a query timestamp, and a 24-hour cache TTL. The returned base-flood elevation is labeled in feet and NGVD29, a datum caveat the page says matters when comparing elevations.
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