The largest oil supply disruption in history, measured in weeks.
Three weeks into a war between the United States and Iran, the Strait of Hormuz — the narrow passage through which a fifth of the world's oil travels — has become a chokepoint felt at every American gas station. Prices at the pump have risen nearly 27 percent in a single month, a pace not seen since Hurricane Katrina, while diesel approaches five dollars a gallon and global supply chains brace for what comes next. The disruption is not merely economic; it is a reminder that the arteries of modern civilization run through contested geography, and that war, however distant, arrives quickly at the ordinary threshold of daily life.
- A 26.9% monthly surge in gas prices — the steepest since Katrina — signals that the US-Iran war has already crossed from geopolitical crisis into kitchen-table emergency.
- Diesel nearing $5/gallon has trucking companies adding surcharges, and those costs are moving toward grocery shelves and retail prices with quiet inevitability.
- Over a dozen vessels struck in the Strait of Hormuz, a UAE oil terminal temporarily shut by drone debris, and Kharg Island hit by US strikes — the region's energy infrastructure is under sustained, widening threat.
- The IEA's release of 400 million barrels from emergency reserves and new US domestic drilling approvals are stopgap measures the market has not yet received with confidence.
- President Trump has warned Iran that its oil infrastructure could become a target, while calling on allies to send warships — so far, no country has committed, and Iran has offered only the faintest diplomatic signal.
At the pump on Monday, Americans were paying $3.72 for a gallon of regular gasoline — the highest since October 2023, and a number shaped by three weeks of war. Since fighting between the US and Iran began February 28, gas prices have climbed 74 cents a gallon, a 26.9 percent monthly rise not seen since Hurricane Katrina. Diesel has gained $1.24 to sit at $4.99, close enough to five dollars that trucking surcharges are already appearing — costs that will eventually reach grocery shelves.
The cause is the Strait of Hormuz. After US and Israeli strikes prompted Tehran to effectively close the waterway, roughly a fifth of the world's oil supply lost its clearest path to market — what analysts at ING called the largest disruption to global oil supply in recorded history. Brent crude reached $103.50 a barrel on Monday; both global benchmarks had hit their highest levels since 2022 the week prior.
US strikes on Iran's Kharg Island on Friday — the departure point for most of Iran's oil exports — deepened the alarm, even though they appeared to target military rather than energy infrastructure. Debris from an intercepted Iranian drone also struck a UAE oil terminal, forcing a temporary shutdown and demonstrating the region's broad vulnerability.
President Trump warned on Truth Social that he might reconsider sparing Iranian oil infrastructure if Tehran continued disrupting shipping, and called on allies to send warships to restore order in the strait. As of Monday, no country had committed. Iran's foreign minister offered a faint signal of openness to talks with nations seeking safe passage.
The White House approved new offshore drilling projects in the Gulf of Mexico and off Southern California, while the IEA announced a release of 400 million barrels from emergency reserves — interventions designed to buy time rather than resolve the underlying crisis. Markets, pricing in a longer conflict with each passing day, have not responded with reassurance.
The strait carries more than oil. Fertilizer, fish, dairy, and produce move through it too — goods that spoil and cannot wait for alternative routes. With more than a dozen vessels already struck since the war began, the question is not whether the next disruption will come, but what form it will take.
At the pump on Monday morning, Americans were paying an average of $3.72 for a gallon of regular gasoline — the highest price since October 7, 2023, and a number that tells a story about what three weeks of war in the Middle East can do to the global energy system.
Since fighting between the United States and Iran began on February 28, gas prices have climbed 74 cents a gallon. That 26.9 percent rise in a single month is the steepest monthly increase the country has seen since Hurricane Katrina tore through the Gulf Coast in 2005. Diesel has been hit even harder, gaining $1.24 to sit at $4.99 a gallon — close enough to the five-dollar threshold that some trucking companies have already begun tacking on fuel surcharges. Those costs, as they always do, will eventually find their way to grocery shelves and retail prices.
The proximate cause is the Strait of Hormuz. After US and Israeli strikes on Iran prompted Tehran to effectively close the narrow waterway to most oil tankers, roughly a fifth of the world's entire oil supply was suddenly without a clear path to market. Analysts at ING described it as the largest disruption to global oil supply in recorded history. On Monday, Brent crude — the global benchmark — was trading at $103.50 a barrel, while the US benchmark, WTI, sat around $98. Both had surged to their highest levels since 2022 the previous week.
The situation grew more complicated over the weekend. US strikes on Iran's Kharg Island on Friday raised fresh alarm, because the island is the departure point for most of Iran's oil exports. The strikes appeared to target military infrastructure rather than energy facilities, but ING commodities strategists noted in a Monday briefing that the distinction offers limited comfort — Iranian oil is, at this point, nearly the only crude still moving through the strait at all. Adding to the anxiety, debris from an intercepted Iranian drone landed on a key oil terminal in the United Arab Emirates, forcing a temporary shutdown and demonstrating that no facility in the region is truly out of reach.
President Trump, writing on Truth Social late Friday, warned that he would reconsider sparing Iran's oil infrastructure if Tehran continued to interfere with shipping passage. On Sunday, he called on China and US allies to dispatch warships to help restore order in the strait, cautioning that NATO faces a grim future if member nations fail to act. As of Monday, no country had committed to sending ships. Iran's foreign minister, Abbas Araghchi, said in a CBS News interview that Tehran would be willing to hold talks with nations seeking safe access to the waterway — a signal, however faint, that some diplomatic channel remains open.
The White House has been moving on other fronts to cushion the blow. Over the weekend, the administration approved a new BP offshore drilling project in the Gulf of Mexico — the company's first new oilfield development there since the Deepwater Horizon disaster in 2010. Energy Secretary Chris Wright also directed Sable Offshore Corp. to restart its rigs and pipelines off the Southern California coast. Whether those moves can meaningfully offset a global supply shock of this scale is a question the market has not yet answered favorably.
The International Energy Agency announced Sunday that member countries had agreed to release 400 million barrels from emergency reserves. Stocks from Asia and Oceania would begin flowing immediately; supplies from the Americas and Europe are scheduled for release by the end of March. It is the kind of intervention designed to buy time, not solve the underlying problem.
The political dimension is not subtle. One of Trump's most consistent second-term talking points has been that he brought gas prices down — including below three dollars a gallon last December, the lowest since May 2021. That argument is now under significant pressure. Jim Reid, head of macroeconomic research at Deutsche Bank, put it plainly in a Monday note: markets are pricing in a longer conflict with each passing day, and concern about further escalation has not eased.
The Strait of Hormuz is not just an oil corridor. Fertilizer for farms around the world moves through it. So do perishable goods — fish, dairy, fruit, vegetables — that spoil quickly and cannot wait for alternative shipping routes to be arranged. More than a dozen vessels have been struck in the waterway since the war began. The question now is whether the next strike is on a tanker, a terminal, or something that changes the calculus entirely.
Notable Quotes
Markets are still concerned about further escalation, and with each passing day investors have moved to price in a more protracted conflict.— Jim Reid, head of macroeconomic research, Deutsche Bank
Tehran is open to holding talks with countries wanting to safely access the strait.— Abbas Araghchi, Iranian Foreign Minister, speaking to CBS News
The Hearth Conversation Another angle on the story
What's the single thing that made this crisis so sudden?
The Strait of Hormuz closing. One narrow waterway, and a fifth of the world's oil supply had nowhere to go.
Has anything like this happened before?
Not at this scale. Analysts are calling it the largest oil supply disruption in history — bigger than anything the Gulf War or the Arab oil embargo produced in terms of immediate physical blockage.
The price jump is being compared to Hurricane Katrina. Is that a fair comparison?
In terms of monthly speed, yes. Katrina wiped out Gulf Coast refining capacity almost overnight. This is a different mechanism — a military blockade rather than a storm — but the pace of the price shock is comparable.
Why does diesel matter more than gasoline here?
Diesel moves freight. Trucks, ships, farm equipment. When diesel climbs a dollar and a quarter in three weeks, surcharges follow, and eventually the cost lands on whatever's sitting on the shelf at the store.
Trump approved new offshore drilling over the weekend. Can that actually help?
Not quickly. New oilfields take years to produce at scale. It's a political signal as much as an energy policy — a way of showing action while the market absorbs a shock that domestic production can't fix in the near term.
Iran's foreign minister said talks are possible. Does that mean anything?
It means the door isn't completely shut. But Iran also laid mines in the strait and threatened to strike US-linked energy infrastructure. Those two things can coexist — it's a negotiating posture, not a ceasefire offer.
What would actually move prices back down?
Either the strait reopens in a meaningful way, or the emergency reserve releases flood enough supply to calm the market. Neither is guaranteed, and the IEA's 400 million barrels is a bridge, not a solution.
What's the thing most people aren't thinking about yet?
Food. Fertilizer moves through Hormuz. So do perishables. The fuel price is visible at the pump every day. The grocery price shock could take another month to fully arrive.