The numbers from the Strait of Hormuz tell the story better than any diplomatic statement can. On a normal day, roughly 120 to 140 vessels transit the narrow waterway between Iran and Oman. Right now, that figure has collapsed to single digits. The world's most critical oil chokepoint, through which roughly 20 percent of the world's oil and liquefied natural gas moves, has become a casualty of war [1].
It started on February 28, 2026, when the United States and Israel launched an air campaign against Iran. Within hours, the Iranian Revolutionary Guard began issuing warnings that vessels bound for US and Israeli ports would not be permitted through the strait. Tanker traffic dropped 70 percent almost immediately, and over 150 ships anchored outside the waterway to wait out the chaos [2]. Within weeks, traffic had ground to a near-complete halt.
The Anatomy of a Chokepoint
The Strait of Hormuz is just 34 kilometres wide at its narrowest. Two unidirectional shipping lanes, one in each direction, carry roughly 20 million barrels of oil a day through those waters in peacetime. During normal conditions, about 3,000 vessels per month make the crossing. That normalcy is gone [1].
The consequences arrived fast. Brent crude breached $100 per barrel in early March for the first time in four years, climbing to $126 at its peak. That made March 2026 the month with the largest monthly oil price increase in recorded history. The disruption to world energy supply surpassed anything seen since the 1970s oil crises [1].
The Blockade Within the Blockade
The situation grew more complex on April 13, when the United States announced a naval blockade of Iranian ports, adding a second layer of restrictions to what was already a closed waterway. Iran had already been controlling which vessels could pass, charging tolls to friendly nations and turning away those linked to the US and Israel [3]. With the US now enforcing its own restrictions, commercial shipping effectively stopped.
Iran briefly reopened the strait on April 17, following a ceasefire agreement in Lebanon. Within 24 hours, it had re-closed the passage after President Trump refused to lift the US naval blockade. Pakistan-mediated talks are still ongoing, with the strait's reopening a central demand in those negotiations [4][5].
The practical reality on the water has not changed. US Central Command has directed at least 38 vessels to turn around or return to Iranian ports since the blockade began [2]. Iran has published maps showing mined areas and an alternative route for approved ships, bringing vessels much closer to Iranian territorial waters than the traditional transit lanes [3].
The 2,000 Ships That Cannot Move
Approximately 2,000 vessels remain stranded in the Persian Gulf, carrying roughly 20,000 mariners who have been caught in the middle of a geopolitical standoff. They cannot move forward without risking attack, seizure, or capture. They cannot turn back because Iranian authorities have also restricted departures. Some have been waiting for weeks [1][3].
The human and economic cost is staggering. At least 17 merchant ships have been damaged, seven have been abandoned by their crews, and two have been captured outright. Twelve seafarers have been killed or remain missing [1]. Maritime insurers have effectively abandoned the route. War risk insurance, which cost roughly 0.25 percent of a vessel's hull value before the conflict, has been cancelled entirely. Those ships that can still get coverage are paying premiums of up to five percent of hull value per voyage [3].
The US military has said it will take six months to clear the mines Iran has laid in the shipping lanes. Iran disputes this timeline. Even if every diplomatic issue were resolved tomorrow, that six-month demining window means the strait cannot simply flip back to normal operations [3].
What Has Permanently Changed
Before February 2026, energy markets treated the Strait of Hormuz as a reliable artery. It never closed, not even during the Iran-Iraq war of the 1980s when both nations targeted each other's oil infrastructure. The resilience of that waterway had become an assumption baked into global supply chain planning.
That assumption has broken. Shipping companies, insurers, and energy traders are now recalculating risk on a route that was considered sacrosanct for decades. The experience of having 2,000 vessels stranded and 20,000 mariners trapped in a diplomatic deadlock has permanently altered how the industry views this chokepoint [1][3].
President Trump has reportedly considered using ground forces to seize control of part of the strait to reopen it to commercial shipping [4]. He has also ordered the US military to engage any vessel that threatens American forces in the area. These escalations have added more uncertainty to a situation that already shows no signs of easy resolution [3].
The world has moved from a period where Hormuz was simply a transport route to one where it is a weapon, a bargaining chip, and a risk calculation all at once. Even when shooting stops, the insurance premiums, the mine clearance timelines, and the stranded vessels will keep the strait's crisis alive for months. The chokepoint has become a scar on the world's energy infrastructure, and scars take longer to heal than the conflicts that caused them.