Where things stand right now
The Strait of Hormuz is a 21-mile-wide gap between Iran and Oman, and on a normal day it is the single most important piece of plumbing in the global energy system. Roughly one out of every five barrels of oil shipped by sea passes through it, along with about a fifth of the world's liquefied natural gas. When it works, almost nobody thinks about it. Since late February 2026 it has barely worked at all.
After fighting between Iran and a U.S.–Israel coalition broke out on February 28, Iran declared the strait closed in early March and began warning off, mining, and attacking ships trying to cross. Insurers pulled back, war-risk premiums exploded, and shipowners simply stopped sending tankers in. More than three months later the waterway is still a near-empty corridor — talk of reopening has picked up, but most owners are not willing to risk their crews and vessels until there's a real, enforceable deal.
The one piece of good news for drivers: prices have eased off their peak. The U.S. national average for a gallon of regular slipped back toward the low $4 range in early June, down from a high near the end of May, as oil prices fell on signals that Washington and Tehran might be inching toward an agreement. To put that in perspective, the same gallon cost under $3 in late February. The relief is real, but it is balanced on a rumor of peace — not a settled one.
How much oil the world actually lost
The scale here is hard to overstate. Before the war, around 20 million barrels of oil and petroleum products moved through Hormuz every single day. When economists line this disruption up against the famous oil shocks of the past, it is in a category of its own — by most measures two to three times larger than the 1973 Arab oil embargo or the 1990 Gulf War shock. Analysts have repeatedly called it the largest geopolitical oil supply disruption in history.
What has kept this from turning into 1973-style chaos at the pump, at least so far, is that the world walked into the crisis with full storage tanks and a lot of oil sitting in government emergency reserves. That cushion has absorbed most of the blow. The problem is that a cushion only works once — and this one is deflating fast.
The buffer is draining — and that's the real story
When the strait closed, the International Energy Agency's member countries agreed to release more than 400 million barrels from their emergency stockpiles, the bulk of it crude. The United States pledged a large share of that and has been pumping oil out of its Strategic Petroleum Reserve — the rainy-day fund the country built decades ago for exactly this kind of moment.
That rainy day has arrived, and the reserve is being drained faster than anyone planned. U.S. emergency stocks fell to roughly 357 million barrels by late May, nearing the lowest level in about four decades. Some analyses suggest reserves are being consumed at close to double the rate originally modeled. Here's the uncomfortable part: a fixed emergency release runs out. Once it's gone, any further drawdown comes from an already-shrunken reserve, and the price of oil has nothing left propping it down. The low-$4 gas of early June is, in part, a number being held in place by stockpiles that won't last forever.
Who's already rationing — a tour of the front line
If you want to know where the U.S. is headed, look at the countries that buy most of their oil from the Gulf. Asia is the front line: the region buys somewhere north of 80% of the crude that normally crosses Hormuz, and some economies are almost entirely dependent on it. Japan imports the vast majority of its oil from the Middle East; South Korea isn't far behind. They have nowhere else to quickly turn.
The response across Asia has looked a lot like the early days of the pandemic:
- Energy rationing has been rolled out in countries including Vietnam, South Korea, Bangladesh and Thailand.
- Four-day work weeks and work-from-home orders have appeared across Indonesia, Malaysia, the Philippines, Pakistan and others to cut commuting demand.
- Japan began tapping both private-sector and government petroleum reserves and committed billions of yen in subsidies to hold pump prices down.
- India has dealt with cooking-gas (LPG) shortages, and several Asian nations have quietly scaled back natural-gas purchases and leaned harder on coal.
- Vietnam saw panic buying; in Cuba, fuel shortages got bad enough that garbage collection stalled and trash piled up in the streets.
Europe's pain is showing up in a more specific place: jet fuel. Analysts have warned that European jet-fuel supplies could drop below the IEA's recognized shortage threshold over the summer, with the U.K. flagged as the country most exposed to outright jet-fuel rationing because it imports so much of it. Governments have responded by reaching for the wallet — Germany suspended fuel taxes, the U.K. delayed a planned fuel-duty increase, and Brazil started subsidizing gasoline and diesel by the month.
When the U.S. feels it — and which states feel it first
The United States is in a genuinely unusual position. It produces a huge amount of its own oil, so it is far better insulated than Japan or South Korea. But "better insulated" is not the same as "safe," and the country is not one uniform market — it's a patchwork of regions with very different exposure.
The clearest dividing line runs east to west. The Gulf Coast, home to roughly half of all U.S. refining capacity, sits closest to supply and tends to see the mildest prices — drivers in states like Oklahoma and Texas have felt this crisis the least. The West Coast is the opposite story, and one energy economist bluntly called it the part of the country that will become the poster child for the consequences of the conflict.
California has been the epicenter, with averages pushing toward $5.80–$5.90 a gallon at the worst points, and Washington close behind. Three things stack the deck against the West Coast: it requires a special, more expensive gasoline blend; it has almost no pipeline connection to the rest of the country, so it relies on tankers and imports; and it carries high state fuel taxes. A federal shipping-rule (Jones Act) waiver has helped move fuel to the West Coast and the Northeast, but it does little for the interior of the country.
Interestingly, the biggest percentage jumps haven't been in the most expensive states — they've been in places that started cheap. Through the spring, the steepest increases were in Utah, Idaho, Tennessee, Mississippi and Kentucky, several of them up more than 45% from before the war. A driver in Mississippi may still be paying less per gallon than one in California, but the size of the leap from where they started is what hits a household budget.
And gasoline is only half the story. Diesel — the fuel behind trucking, freight, construction, farming and rail — climbed sharply, at points up around 50% from the start of the war. Diesel is the quiet one to watch, because its cost rides along on nearly everything that moves by truck. When diesel goes up, groceries, packages and building materials follow a few weeks later, whether or not you ever buy a drop of it yourself.
The road to rationing: a realistic timeline
Nobody can give you a precise date, and anyone who claims to is guessing. But the shape of the risk is fairly clear, and it bends on one variable above all: how long the strait stays shut.
- Now through summer (June–July): Industry leaders have flagged this window as the point where the most import-dependent countries could begin facing critical shortages. Europe's jet-fuel squeeze is the first concrete test. For U.S. drivers, the near-term risk is less about empty pumps and more about prices climbing back if peace talks stall.
- A prolonged closure (roughly 12 weeks and beyond): Market models have pointed to oil around $154 a barrel if the strait stays effectively closed for about three months — and in a serious escalation, analysts no longer treat $200 oil as an outlandish call. At those levels, the conversation shifts from "expensive gas" to demand destruction, where prices climb until people and businesses are forced to simply stop using fuel.
- The reserve cliff: The real U.S. inflection point isn't a calendar date — it's the moment the emergency-release oil runs low. As long as reserves are flowing, prices stay capped. When that buffer thins out, the floor under prices gives way, and that is the scenario in which talk of formal conservation measures stops being theoretical.
How bad could it actually get?
Straight answer: it depends almost entirely on the war, and the range of outcomes is wide. On the milder end, a credible reopening deal brings tankers back, reserves get refilled over time, and this becomes a painful but survivable price spike — closer to the 2022 energy shock than to a depression.
On the harsher end, a closure that drags through the second half of the year does real economic damage. Forecasters have already trimmed global growth projections, and the word that keeps coming up is recession. One widely watched model put U.S. recession odds at roughly a coin flip even before the worst of the shock; others are lower but rise sharply if oil holds above about $140 a barrel for a sustained stretch. The head of the world's largest asset manager warned that $150 oil could be enough to tip the global economy into a downturn. The mechanism is simple and old: energy is an input to almost everything, so a sustained spike acts like a tax on every household and business at once, and discretionary spending is the first thing to go.
The honest summary is that the United States is unlikely to see 1970s-style "odd-even license plate" gas rationing unless the crisis escalates well beyond where it is today — but it is already living through the second-order version: higher prices, a thinning safety reserve, and an economy quietly absorbing an energy tax. The countries on the other side of the world are showing us the next chapters in advance. Whether the U.S. has to read them depends on whether that narrow strip of water reopens — and on whether the peace currently being priced into your gas pump turns out to be real.
What this means for you
You don't control the Strait of Hormuz, but a few things are worth keeping an eye on. Watch diesel as much as gasoline — it's the better early-warning signal for prices on everything else. Expect volatility rather than a smooth line; this market is now swinging on headlines about negotiations, so a single news cycle can move pump prices either direction. And remember that the relatively calm number you saw at the station this week is being held up partly by emergency reserves that are running down. The crisis isn't over because prices dipped — it's paused, and the pause is being paid for out of the tank the country was saving for emergencies.