Flood map coverage in Hawaii

FEMA's National Flood Hazard Layer holds 596 FIRM panels for Hawaii from 4 digital flood map databases, reaching 4 of its 5 counties. Computed September 29, 2026.

596FIRM panels

49%took effect before September 29, 2016

2026-06-10newest panel (15003C0387H)

30LOMRs in effect

What to expect from lookups here

1 county has no digital FIRM in the NFHL (listed below). Points there come back "mapped": false.
3 of the maps are community-numbered, so parts of the counties they sit in may have no digital map.
The map that has gone longest without a new panel is Maui County (150003), last revised 2015-11-04.

A real lookup in Hawaii

The point is the Census internal point of Honolulu County, the county with Hawaii's most recently effective FIRM panel. FEMA's map puts it in zone AE. Recorded September 29, 2026.

Request

curl -sG https://api.floodzoneapi.com/api/v1/flood/zone \
  -H "Authorization: Bearer $FZA_KEY" \
  -d lat=21.46137 -d lon=-158.20197

Response 200

{
  "query": {
    "lat": 21.46137,
    "lon": -158.20197
  },
  "location": {
    "lat": 21.46137,
    "lon": -158.20197,
    "geocoder": null,
    "precision": "input_coordinates",
    "matched_address": null,
    "candidates": null,
    "county": null,
    "county_fips": null,
    "state": null
  },
  "flood_zone": {
    "mapped": true,
    "zone": "AE",
    "subtype": null,
    "description": "1% annual chance flood hazard. Base flood elevations determined.",
    "sfha": true,
    "static_bfe": null,
    "depth": null,
    "dfirm_id": "15003C",
    "polygon_id": "15003C_637",
    "at_zone_boundary": false,
    "other_zones": []
  },
  "firm_panel": {
    "panel": "15003C0183J",
    "effective_date": "2026-06-10",
    "panel_type": "Countywide, Panel Printed",
    "dfirm_id": "15003C",
    "other_panels": []
  },
  "source": {
    "dataset": "FEMA National Flood Hazard Layer (NFHL)",
    "service": "https://hazards.fema.gov/arcgis/rest/services/public/NFHL/MapServer",
    "layers": [
      {
        "id": 28,
        "name": "Flood Hazard Zones"
      },
      {
        "id": 3,
        "name": "FIRM Panels"
      }
    ],
    "query_point": {
      "lat": 21.46137,
      "lon": -158.20197
    },
    "queried_at": "2026-09-29T08:37:37Z",
    "cached": true,
    "cache_ttl_seconds": 86400
  },
  "notice": "Informational. This is the zone shown on FEMA's effective flood map (NFHL) at this point. It is not a Standard Flood Hazard Determination (FEMA Form 086-0-32), a prediction of flood risk, or an insurance quote, and it does not reflect a Letter of Map Amendment issued for a single structure."
}

Every digital flood map in Hawaii

Dates are panel effective dates (YYYY-MM-DD). "Placeholder" means FEMA's record carries a non-date such as 9999-09-09. "Over 10 years old" counts panels effective before September 29, 2016. "LOMRs in effect" are Letters of Map Revision not yet folded into a new FIRM. The DFIRM ID appears in responses as `flood_zone.dfirm_id` and `firm_panel.dfirm_id`.
Map	DFIRM ID	ID type	Panels	Newest panel	Oldest panel	Over 10 years old	LOMRs in effect
Hawaii County	155166	Community-numbered	219	2017-09-29	2017-09-29	0	10
Honolulu County	15003C	County	113	2026-06-10	2004-09-30	40	1
Kauai County	150002	Community-numbered	86	2021-02-26	2005-09-16	74	0
Maui County	150003	Community-numbered	178	2015-11-04	2009-09-25	178	19

Counties with no digital FIRM in the NFHL

No digital flood map in the NFHL links to these counties (Census county FIPS in brackets). Addresses here return "mapped": false; FEMA may still have paper maps for them.

Kalawao County (15005)

Source: FEMA NFHL layers 1, 3 and 22 and the Census Bureau county gazetteer, computed September 29, 2026. All states · API reference