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A brief surge in commercial shipping through the Strait of Hormuz — the world’s most critical oil chokepoint — has already begun to reverse, raising fresh doubts about whether a durable reopening of the waterway is achievable amid continued hostilities between the United States and Iran.
Why It Matters
The Strait of Hormuz carries a significant share of global energy and commercial cargo. Its near-closure since fighting broke out in late February has disrupted supply chains worldwide, stranded thousands of sailors, and driven shipping costs sharply higher. A genuine reopening would ease pressure on global markets, but the rapid reversal of this week’s gains suggests the path to normalcy remains treacherous.
What Happened
On Wednesday, 73 vessels moved through the strait — the highest single-day total since the war with Iran began and more than double the volume recorded just the day before. The spike followed the United States lifting sanctions on Iranian oil earlier in the week as part of a ceasefire agreement between Washington and Tehran.
The International Maritime Organization, along with Iran and Oman, established two new shipping corridors on Wednesday to help vessels navigate safely — one running along the northern edge of the strait near Iran, and another along the southern edge near Oman. Both were designated as cleared of mines and other hazards. The strait’s navigable passage spans just 21 miles.
The UN and the IMO simultaneously launched a humanitarian operation targeting the evacuation of roughly 11,000 stranded seafarers and approximately 500 vessels that had been effectively trapped in or near the strait since hostilities began.
The brief opening did not last. On Thursday, the IMO suspended evacuation operations after a vessel was struck in the Gulf of Oman. A U.S. official attributed the strike to an Iranian drone, though Iran has not claimed responsibility. By Friday, Iran issued a direct warning to commercial ships, declaring that safe passage would only be guaranteed along routes formally declared to Iranian authorities. Traffic through the strait fell by roughly half on Friday.
By the Numbers
- 73 — vessels transiting the strait on Wednesday, the highest count in roughly three months
- Fewer than 10 — average daily vessel transits since fighting began, compared to a pre-war baseline of 110 to 160 per day
- 11,000 — seafarers targeted for humanitarian evacuation
- 46 — total strikes on vessels recorded since the conflict began
- 14 — deaths attributed to those strikes
Early Optimism Fades
Gene Seroka, a port logistics official, described the Wednesday movement as primarily driven by humanitarian need rather than commercial recovery. “What we’re seeing are the ships that were sitting in the Gulf for this elongated period of time starting to move out with a focus on humanitarian aid to get the seafarers out,” he said.
Industry analysts cautioned against reading the Wednesday spike as a signal that normal commerce is resuming. Shipping analyst Sanne Manders noted that the vessels moving through the strait this week were predominantly Iranian-flagged, along with some ships operated by Taiwan’s Evergreen. “The major global carriers haven’t returned yet, so it’s closer to status quo than a real shift,” Manders said.
Hapag-Lloyd, one of the world’s largest container carriers, used U.S. naval escorts to move through the strait — an indication that even those willing to attempt passage are not doing so without significant security support.
Zoom Out
The Hormuz situation is part of a broader pattern of maritime instability across strategic waterways. China has also been asserting itself beyond the First Island Chain in the Pacific, adding to concerns among U.S. defense planners about simultaneous pressure points on global sea lanes. The combination of Iranian aggression in the Persian Gulf and Chinese maritime expansion presents compounding challenges to U.S. naval resources and alliance commitments.
What’s Next
The IMO has not announced when it will resume evacuation operations following Thursday’s vessel strike. Iran’s Friday warning signals that Tehran retains the ability — and apparent willingness — to reassert control over strait access despite the ceasefire framework. Until major global carriers resume normal transits and mine-clearing operations are verified across both new corridors, shipping industry analysts say the strait should be considered partially open at best.
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