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FEMA flood zones · Alaska

Denali Borough, Alaska Flood Zone Map

FEMA’s digital flood map shows no high- or moderate-risk zones in Denali Borough. That can mean the area was never studied in detail or has no digital map, not that it can’t flood; the county floodplain administrator can say which.

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 Denali Borough, Alaska. 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.

Federal disasters

10 federal disaster declarations since 1999.

DisasterBegan
Bear Creek FireJun 22, 2025
Clear FireJun 21, 2022
Severe Winter Storm And Straight-line WindsDec 25, 2021
Severe Storm, Straight-line Winds, Flooding, And LandslidesSep 15, 2012
Severe Storms, Flooding, Landslides, And MudslidesJul 27, 2008
Severe Storms, Flooding, Landslides, And MudslidesAug 15, 2006
EarthquakeNov 3, 2002
Severe Winter Storms And AvalanchesDec 21, 1999

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

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 Denali Borough

If a building in Denali Borough 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.