Automated baseline from FEMA and NOAA data, release 2026-10.

Yukon-Koyukuk Census Area, AK

Risk-assessment baseline packet. County FIPS 02290. Release 2026-10, data as of 2026-09-30.

Summary

Plan status as of 2026-09-30: No county-level plan row in FEMA data.

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Cold Wave ($9,276,450 a year), Wildfire ($1,258,932) and Earthquake ($647,327).

The packet's tables are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); the summaries below follow the same order.

Download the packet

Full packet as a web page. File manifest (checksums, source versions).

Plan clock

No county-level plan row in FEMA data

What changed since your last plan

No county-level plan row in FEMA data, so there is no approval date to count from.

Plan status for every jurisdiction listed in this county

16 jurisdictions. Each row is that jurisdiction's own plan clock.

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underway
Allakaket cityCityExpired on 2024-01-17Allakaket City and Village MJHMP (FEMA plan 104611)2019-01-182024-01-17-987FEMA tracker shows a plan in progress
Circle CDPUnincorporatedExpired on 2019-07-23Circle HMP (FEMA plan 25022)2014-07-232019-07-23-2,626
Fort Yukon cityCityExpired on 2023-01-10Fort Yukon HMP (FEMA plan 104579)2018-01-112023-01-10-1,359FEMA tracker shows a plan in progress
Galena cityCityApproved, expires 2027-09-25Galena City and Louden Tribal Council MJHMP (FEMA plan 108408)2022-09-262027-09-25360
Grayling cityCityExpired on 2020-12-22Grayling HMP (FEMA plan 101411)2015-12-222020-12-22-2,108
Holy Cross cityCityExpired on 2018-11-08Holy Cross HMP (FEMA plan 25045)2013-11-082018-11-08-2,883
Hughes cityCityNo approved plan on recordnonenonenoneFEMA tracker shows a plan in progress
Huslia cityCityApproved, expires 2027-10-26Huslia City and Native Village MJHMP (FEMA plan 108508)2022-10-272027-10-26391
Kaltag cityCityExpired on 2024-02-11Kaltag City and Native Village MJHMP (FEMA plan 104999)2019-02-122024-02-11-962
Koyukuk cityCityExpired on 2013-10-02Koyukuk City (FEMA plan 25077)2008-10-032013-10-02-4,746
McGrath cityCityExpired on 2023-10-14McGrath City and Native Village MJHMP (FEMA plan 105140)2018-10-152023-10-14-1,082
Nenana cityCityExpired on 2015-09-24Nenana HMP (FEMA plan 25092)2010-09-242015-09-24-4,024FEMA tracker shows a plan in progress
Nikolai cityCityApproved, expires 2027-10-02Nikolai HMP (FEMA plan 108518)2022-10-032027-10-02367
Ruby cityCityExpired on 2023-03-28Ruby HMP (FEMA plan 104580)2018-03-292023-03-28-1,282
Shageluk cityCityNo approved plan on recordnonenonenoneFEMA tracker shows a plan in progress
Tanana cityCityExpired on 2024-03-11Tanana City and Village MJHMP (FEMA plan 104995)2019-03-122024-03-11-933

State plan status and tribal plans in this state: see the state page.

What the packet contains

Sections in FEMA checklist order; each heading names the review item its tables support. Full tables are in the downloads above.

Supports FEMA checklist item B1-a Hazard identification

15 of the 18 National Risk Index hazards apply here.

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: hurricane and tsunami. That is the evidence for leaving them out of the plan.

Highest expected annual loss (NRI, modeled): Cold Wave, Wildfire and Earthquake.

Not covered by NRI (local data needed): dam failure (incl. upstream dams); levee failure; flash flood as its own subtype; ice jams; debris flows; erosion (riverine and coastal); land subsidence and sinkholes; expansive soils.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b Hazard location

  • Avalanche, Coastal Flooding, Earthquake, Landslide, Tornado, Volcanic Activity and Wildfire vary within the county; the packet lists the highest-rated census tracts for each.
  • Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather: affects the whole county; national data give no location within it.
  • Inland Flooding: the FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Supports FEMA checklist item B1-c Hazard extent

Storm Events records for 10 of the 20 NOAA event-type groups mapped to the 18 hazards, with the scale, observed range and worst recorded event for each; the others say which local data are needed.

Worst recorded tornado, hail and thunderstorm wind (the three event types on record since the 1950s; the packet has every group):

  • Hail: No hail record can stand as this county's largest: the 3 records with a recorded size reached this county only through an NWS zone that covers more than one county, so the hail may have occurred outside this county (zone-level); they are counted as occurrences.
  • Thunderstorm Wind: No thunderstorm wind record can stand as this county's strongest: the 4 records with a recorded speed reached this county only through an NWS zone that covers more than one county, so the wind may have occurred outside this county (zone-level); they are counted as occurrences.

Supports FEMA checklist item B1-d Previous occurrences

Federal declarations for this area: 19 declarations covering 17 separate hazard incidents counted in this packet; each with type, dates and county Public Assistance dollars.

No county-level plan row in FEMA data, so there is no approval date to count from.

4 statewide declarations listed separately.

Hazards with no Storm Events record and no federal declaration are stated as such (7 of 18).

Storm Events history: 639 records (notable ones in the PDF, all of them in the Excel file).

Supports FEMA checklist item B1-e Probability of future events

FEMA annualized frequency (modeled) for each hazard, with a descriptor from a scale defined in the packet.

  • Highly likely: Landslide and Lightning
  • Likely: Coastal Flooding, Cold Wave, Ice Storm, Inland Flooding, Wildfire and Winter Weather
  • Possible: Avalanche and Volcanic Activity
  • Unlikely: Hail, Strong Wind and Tornado

Historical frequency by intensity band (tornado, hail, wind): 9 bands from Storm Events.

Supports FEMA checklist item B1-f Hazards that vary across jurisdictions

Range of census tract risk scores within the area for 16 of the 18 hazards (4 tracts; rated tracts only).

16 jurisdictions: plan clock, repeat-flood count, Public Assistance dollars and event records naming the place (starting figures from federal data).

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b Vulnerability and potential impacts

The packet's table gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

No county-level plan row in FEMA data, so there is no approval date to count from.

Local data needed

To gather:

  • Critical facilities and lifelines per hazard
  • A problem statement per jurisdiction per hazard
  • Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
  • Future assets

Supports FEMA checklist item B2-a Vulnerability (county context)

Population 5,280; building value $1,691,226,898 and agriculture value $0 (total, not at risk).

National Risk Index rating Relatively Low; social vulnerability Very High; community resilience Very Low.

Supports FEMA checklist item B2-c Repetitive loss properties

Repetitive-loss properties, FMA definition (44 CFR 77.2): 0 repetitive loss, 1 severe repetitive loss. NFIP insurance definition: 0 and 0.

Mitigated 0; insured 0; NFIP data as of 2026-08-02. Counts by occupancy group and for each jurisdiction are in the packet.

Releases

Each release is dated; this is release 2026-10. It was first published 2026-09-30; its files do not change. Later releases will be listed here with what changed between them. All releases.

Cite this

Hazard Plain (2026). Yukon-Koyukuk Census Area, AK: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 02290). Automated baseline. https://hazardplain.org/ak/02290/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Source citations for the plan's bibliography (8)

How this packet is built: methods and sources