Risk-assessment baseline packet. County FIPS 53029. Release 2026-10, data as of 2026-09-30.
Summary
Plan status as of 2026-09-30: Expired on 2025-09-02. Plan: Island County Multi-Jurisdictional Hazard Mitigation Plan (FEMA plan 106694), approved 2020-09-03.
Update: FEMA tracker shows a plan in review.
Since the plan was approved on 2020-09-03: 5 new hazard declarations (5 incidents) and 19 NOAA Storm Events records; details under "What changed since your last plan".
Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Earthquake ($22,275,868 a year), Inland Flooding ($7,875,532) and Landslide ($5,711,493).
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.
What changed since your last plan (approved 2020-09-03)
- New federal declarations:
- 5 new hazard declarations (5 incidents): DR-4593-WA (Severe Winter Storm, Straight-Line Winds, Flooding, Landslides, and Mudslides), DR-4635-WA (Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides), DR-4682-WA (Severe Winter Storm, Straight-Line Winds, Flooding, Landslides, and Mudslides), DR-4775-WA (Severe Winter Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides), DR-4906-WA (Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides)
- Storm Events records since approval:
- 19 records (data through 2026-06-30)
- Repetitive loss now:
- FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 20
- Repeat-flood change:
- this release sets the baseline count.
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
17 of the 18 National Risk Index hazards apply here.
Highest expected annual loss (NRI, modeled): Earthquake, Inland Flooding and Landslide.
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, Earthquake, Hurricane, Landslide, Tornado, Tsunami, Volcanic Activity and Wildfire vary within the county; the packet lists the highest-rated census tracts for each.
- Coastal Flooding and 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.
- 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.
Supports FEMA checklist item B1-c Hazard extent
Storm Events records for 7 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):
- Thunderstorm Wind: 53 kt (61 mph), measurement type not recorded, Thunderstorm Wind, 1986-01-06
Supports FEMA checklist item B1-d Previous occurrences
Federal declarations for this area: 22 declarations covering 19 separate hazard incidents counted in this packet; each with type, dates and county Public Assistance dollars.
New since the last plan (approved 2020-09-03): DR-4906-WA, DR-4775-WA, DR-4682-WA, DR-4635-WA and DR-4593-WA.
4 statewide declarations listed separately.
Hazards with no Storm Events record and no federal declaration are stated as such (9 of 18).
Storm Events history: 118 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: Coastal Flooding and Lightning
- Likely: Landslide and Winter Weather
- Possible: Avalanche, Earthquake, Heat Wave, Inland Flooding, Tornado and Tsunami
- Unlikely: Hail, Strong Wind, Volcanic Activity and Wildfire
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 18 hazards (23 tracts; rated tracts only).
4 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 matched to a jurisdiction row here (for example county offices and boards filed under their own names, such as a sheriff's office or a conservation board, and 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.
Storm Events damage since 2020-09-03: none reported in county-coded records (0 records); $5,000,000 reported for the zone (19 zone records). Data through 2026-06-30; nominal dollars.
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 86,855; building value $19,753,603,095 and agriculture value $15,455,673 (total, not at risk).
National Risk Index rating Relatively Low; social vulnerability Relatively Low; community resilience Very High.
Supports FEMA checklist item B2-c Repetitive loss properties
Repetitive-loss properties, FMA definition (44 CFR 77.2): 0 repetitive loss, 0 severe repetitive loss. NFIP insurance definition: 20 and 0.
Mitigated 0; insured 8; NFIP data as of 2026-08-02. Counts by occupancy group and for each jurisdiction are in the packet.