The Thin Line of Ships — Threat Assessment: Hawaiʻi Island's Food and Fuel Supply Under the Iran War

Paper 01 of 8 · Ka Lako ʻĀina · Hawaiʻi Island Food Resilience Initiative

A joint program of Hawaii Farmers Union United (Big Island) and the Pure KNF Foundation. Prepared for boards, policymakers, and funders. Data as of June 10, 2026 — day 102 of the war. Every load-bearing number links to its source. Estimates are labeled as estimates. Companion papers: 00 Executive Summary · 02 How We Fed Ourselves · 03 What We Have Now · 04 The Plan (Five Moves) · 05 Public Opinion Strategy · 06 The Free Economy.

The finding in one paragraph. Hawaiʻi Island eats from a barge. The war has not stopped a single sailing — it has repriced every one. In 102 days, the fuel surcharge on essentially everything the island imports rose 15 percentage points, Hilo diesel reached $7.09 a gallon — up roughly 36% in a year — nitrogen fertilizer rose 24.5–35.6%, and the state's consumer advocate warned of 20–30% higher electric bills. Then two March storms hit a farm base that was 75% uninsured, and the state's relief program offered a maximum of $1,500 per farm. None of this is catastrophe. All of it is the same instrument reading: a supply system with no buffer, repricing under load, with no institution above the county level acting on it. This paper describes the line as it actually runs, what the war has verifiably done so far, why this shock differs from 2020, and the gauges we will watch in public.

1. The exposure, in one page

Hawaiʻi imports roughly nine-tenths of its food. The most rigorous benchmark — University of Hawaiʻi and state agricultural economists measuring 2010 flows by weight — put imports at 88.4% of food available for consumption, with 11.6% grown or raised here (Loke & Leung 2013). The state's standing planning estimate is 85–90% (OP-DBEDT 2012). Residents send an estimated $3–7 billion a year out of state for food — $3.1B on a 2004–05 spending basis (CTAHR EI-16), $6.8B on a 2017 basis (Crossroads Resource Center) — both excluding tourist spending. No official current total exists, because interstate shipments are not customs-tracked.

For this island, the line is a two-stage sea bridge:

• Stage one: Jones Act containerships — Matson and Pasha, the only mainland carriers — sail the West Coast to Honolulu, about a week dock to dock. Essentially all Big Island containerized food transships there (DBEDT Marine Cargo Report, 2024).
• Stage two: barges. Young Brothers runs two sailings a week to Hilo and two to Kawaihae; the cold chain rides four reefer-barge departures a week (YB schedules). Matson has discharged exclusively at Kawaihae since 2021, so East Hawaiʻi's Matson boxes finish the trip by truck over the Saddle (Hawaii Tribune-Herald, 5/1/26).

By the state's own draft environmental assessment, the two commercial harbors carry "more than 90% of food and 95% of fuel consumed on the island" (Tribune-Herald, 5/1/26). In 2021 that meant about 144,000 tons of food and farm cargo inbound — roughly 395 tons a day, or about 1.9 kg per person per day for the county's 209,790 residents (DBEDT Marine Cargo Report). Neither harbor has a container gantry crane or a drydock; handling is by top-pick and forklift (HDOT 2035 Master Plan).

The barge leg is also financially thin. Young Brothers — the single, PUC-regulated interisland operator — lost money in 2018 and 2019, needed a $25M federal CARES bailout in 2020 to keep barges sailing, and won a 25% rate increase in November 2025. The one leg with no redundancy is carried by a money-losing utility.

2. Just-in-time means just about none

The system is built for freshness and capital efficiency, not resilience. Chad Buck, founder and CEO of Hawaiʻi Foodservice Alliance, said it best, contrasting his own volumes with the state's COVID-era plan to warehouse 100 containers of emergency food:

"We bring in 2,000 containers of food every week." (Hawaii Business, Feb 2022)

Statewide, roughly 400 containers of food arrive every day. How deep is the shelf behind them? Nobody has measured it. The figure in every briefing — about 5–7 days of food on hand — is an HI-EMA-attributed planning estimate, cited in legislative testimony, never published as an inventory census. It also happens to match West Coast sailing time. Honolulu's current working figure is closer to 3 days; FEMA's in-state stockpile covers about 4.25 days. Hawaiʻi Island holds no strategic food reserve of its own, and every one of those day-counts is an Oʻahu number — our island adds a barge leg to each.

The charitable layer, strong as it is, cannot carry the load: The Food Basket moves 3–3.5 million pounds a year — on a derived basis about 1% of the island's daily inbound food tonnage.

Households are the last buffer, and the state knows it: the official standard has been 14 days of food, water, and medicine since July 2017. The measured reality: 12% of households meet it, while 56% believe they are prepared (Zougris & Miles, UH, Dec 2025). That 44-point gap between feeling ready and being ready is addressable — and it is the explicit target of Paper 05.

3. The fuel jugular: one pier, one refinery, no reserve

Food rides on fuel — barges, trucks, reefers, cold storage, water pumps. The island's fuel line is narrower than its food line, and it is worth stating plainly because false versions circulate: there is no fuel pipeline from the mainland to Hawaiʻi, and none between islands. There is no state strategic fuel reserve. The actual chain, each link documented:

1. Crude arrives by tanker and is piped ashore from moorings off Oʻahu (Hawaiʻi State Energy Office).
2. It is refined at Par Hawaii's Kapolei refinery — 94,000 barrels a day, the state's only refinery — which has a planned maintenance turnaround in July 2026, mid-war (Star-Advertiser, 3/2/26).
3. Refined product moves to this island only by barge, principally into Hilo Harbor's Pier 3: "the main portions of fuel oil, jet fuel, ethanol and LPG are only shipped through Hilo," with West Hawaiʻi supplied by tanker truck from Hilo (HDOT Statewide Fuel Facilities Plan).

Hawaiʻi's crude is Atlantic-basin — Argentina 62%, Libya 21%, Nigeria 11%, Guyana 6% in 2025, zero scheduled Persian Gulf cargoes (HSEO Fuel Imports Dashboard). But the refined products imported on top of Kapolei's output are not: 88% of imported gasoline and 95% of jet fuel come from South Korea (HSEO Dashboard) — and Korean refineries run on Persian Gulf crude now moving at a fraction of pre-war volume. We are insulated from the Gulf physically, not economically. A second Pacific-side disruption — touching Korean refining or trans-Pacific lanes — would hit product supply and shipping at once. That is the scenario that turns price pain into physical shortage.

Electricity hangs on the same pier. Hawaiʻi Island's grid is the most renewable in the Hawaiian Electric system — 57.3% in 2025, anchored by 38 MW of geothermal with 22 MW more permitted — a real strength. But roughly 243 MW of the island's firm non-geothermal capacity burns oil barged solely into the Island Energy Services terminal in Hilo. Cold storage, water pumps, and gas-station dispensers all ride that grid.

How many days of fuel does the island hold? No agency publishes the number, and no per-island figure exists. It can be estimated from federal data: EIA's monthly Hawaiʻi primary stocks (refinery and bulk-terminal only; retail inventories excluded), divided by state consumption, yield planning ranges of roughly 42–59 days of distillate and 5–9 days of finished gasoline statewide (about 22–29 days counting gasoline blending components) (EIA Hawaiʻi product stocks, Oct 2025–Mar 2026). Derived estimates, not measurements. Par Hawaii's president called supply "stable for the near term" (Civil Beat, April 2026) — a fair qualitative read. The absence of an official metric is itself a finding, and our standing policy ask: publish official, island-level days-of-supply figures for food and fuel. You cannot manage a buffer you refuse to measure.

4. How the war reaches the shelf — verified, day 102

The war began February 28, 2026. The honest causal chain for Hawaiʻi is: war → oil and bunker-fuel prices → carrier fuel surcharges and diesel-inflated barge and truck legs → landed grocery cost. Here is what has verifiably moved:

Upstream: Strait of Hormuz flows fell almost 30% year-over-year to 14.6 million barrels a day in Q1 — about 6 million barrels a day lost — and EIA assesses regional production shut-ins averaged 11.3 million barrels a day in May, with the strait "effectively closed" to normal commercial transit. Matson's surcharge filing cited an OPEC basket price up approximately 90% from late February. Fertilizer exposure is structural — Gulf countries supply 36% of global urea exports and about half of traded sulfur — though spot urea is volatile: briefly +80%, then a partial retreat. Mainland farms now budget fuel at $20–30 an acre, up from $16–23 — and everything those farms grow is upstream of our barge.

Attribution discipline — what we will not claim. Asia–US container spot rates have roughly doubled since late February (Drewry WCI). We will not call that a war effect, because the index publishers don't: Drewry attributes the surge mainly to an early peak season and tariff front-running, with the war contributing through bunker costs and surcharges. Hormuz disrupts about a fifth of the world's oil but only 2–3% of container volumes. The war's clean, documented channel to this island is fuel — the surcharge line and the diesel pump — and that channel alone justifies everything this initiative proposes. Credibility is the campaign's primary asset. We state what the data states.

5. War-risk insurance: the valve that closes a sea lane

Commercial straits are not closed by navies first. They are closed by underwriters. War risk is sold separately from ordinary hull cover, repriced per transit in 48-hour-to-7-day increments when a route enters the Joint War Committee's listed areas. Pre-war, a Hormuz transit's additional war-risk premium ran about 0.1–0.15% of hull value. At the early-March peak it hit roughly 2.5% per seven-day period, settling near 1% by late March — still several times the pre-war norm, with US-linked tankers quoted 5–10% (Howden Re). At those prices, most owners stopped sailing. The market closed the strait before any blockade did.

Hawaiʻi-bound lanes carry no war-risk surcharge as of June 2026. Our exposure runs through fuel prices and Korean product supply, not route risk. That is exactly why the mechanism matters: it is the early-warning instrument. No missile needs to land within a thousand miles of Hawaiʻi for a Pacific-side premium spike to halt sailings to an island that holds about a week of food. The day a war-risk line item appears on a Hawaiʻi or trans-Pacific lane is the day this assessment escalates — which is why it sits on the watchlist below.

6. The compounding shock: March storms on an uninsured farm base

Three months into the war, two Kona Low storms (March 10 and March 15–23) hit Hawaiʻi agriculture. Governor Green's estimate: roughly $40 million in farm damage and $1 billion statewide — with only 1,600 of 6,500 farms reporting, and the Farm Bureau saying the real total could be two to three times higher. 75% of affected farmers had no crop insurance. Flooded Oʻahu farms emptied Chinatown's produce bins, and vendors back-filled with mainland imports at war prices (Tribune-Herald, 4/1/26) — a live demonstration of local supply failure converting straight into import dependence.

The state's response defines its capacity in its own words. The Emergency Farmer Relief Program in the Governor's Sixth Emergency Proclamation provides that an affected farmer shall "not be eligible to receive more than one grant of $1,500.00" (Proclamation, 3/25/26). One flat $1,500, against losses individual farms reported in the tens and hundreds of thousands. We quote the document, not commentary. And we note the parallel fact: as of June 10, 2026, no emergency proclamation or war-specific food-security statement from the Governor's office has been located. The documented mobilization so far is county-level and civil-society. Planning that assumes more than that is not planning.

7. Calibration: 1949 and 2020

1949 proved the chokepoint. A longshore strike shut Hawaiʻi's docks from May 1 to October 23, 1949 — about six months, shipping at "a virtual standstill." The territory passed a dock-seizure law on August 6 and seized two stevedoring firms by August 10 — emergency seizure legislation inside 14 weeks, because there was no other lever. The one detailed account on record (single-source; direction corroborated by federal labor reporting of the period) puts the food-price rise near 6%, with mass layoffs and half the sugar crop stranded. And in 1949 the islands still had some 250,000 farm acres and a fishing fleet behind them. The one-artery arithmetic has not improved since; the farm base behind it has shrunk. World War II taught the harder lesson — Oʻahu ate from escorted convoys of ~32,000 tons a month on a $35M federal fund, while local food production met "indifferent success" because Washington kept the land in sugar. Paper 02 tells that story in full; its conclusion belongs here: nobody else will order our land into food. That decision is ours, ahead of time.

2020 was the wrong rehearsal. COVID was a demand shock: tourism stopped, freight kept sailing, and the near-failure was financial — Young Brothers lost its volume and needed $25M in federal CARES money within months. Shelves wobbled from panic buying, not missing ships, and a flush federal government wrote checks. This is a supply-cost shock: the ships still sail, but every sailing, gallon, and ton of fertilizer costs more, compounding monthly, while federal attention and lift are committed to an active war. The 2020 lesson is not "we got through it." It is that the state's emergency concept was 100 warehoused containers against a 2,000-container weekly flow — and the structure that nearly failed from the demand side is now squeezed from the cost side.

8. The watchlist: gauges we read in public

Leadership in this situation looks like an instrument panel, not a siren. The initiative maintains these indicators and publishes them on the campaign's live data page:

With County Civil Defense, we propose published escalation thresholds — planning triggers stated in advance (for example: FRSC at or above 35%; Hilo diesel at or above $8.00; derived gasoline cover below five days; any Hawaiʻi-lane war-risk surcharge). Crossing one doesn't mean alarm. It means the next pre-agreed action starts. That is the difference between leadership and reaction.

What you can do now

Board members (HFUU Big Island, Pure KNF Foundation, allied orgs):

• Adopt this assessment as the initiative's baseline threat picture; authorize the live data page (the fuel logger is already running, verified against AAA).
• Authorize the County Civil Defense briefing — the island's emergency-feeding machinery has no producer-network or food-supply annex attached; offering one costs the county nothing.
• Approve the escalation-threshold framework, so responses are decided calmly, in advance.

County policymakers:

• Take the briefing. Attach a food-supply annex and producer-network liaison to Civil Defense planning.
• Adopt the standing ask: publish official island-level days-of-supply metrics for food and fuel. What gets measured gets managed.

Funders:

• The §8 watch infrastructure is cheap and partly built — funding it buys public credibility for everything that follows.
• The exposure documented here is the case for Paper 04: The Plan and the asks in Paper 06. The time to widen the island's own food base is while the ships are still sailing.

The line still holds. Prices, not shortages — so far. That is precisely the window in which serious people act.

— Prepared for the Hawaiʻi Island Food Resilience Initiative, led by Drake Weinert (president, HFUU Big Island; president, Pure KNF Foundation). June 10, 2026.