Strait of Hormuz Put on 'Severe' Alert as Tanker Attacks Send Insurance Costs Soaring

Verified key facts

• The Joint Maritime Information Center raised its Hormuz transit advisory from 'substantial' to 'severe', the highest level, The New Arab reported
• Iran attacked three tankers in the strait early on 14 July, including the Norwegian-owned Stolt Magnesium and two UAE-owned vessels
• War-risk cover has leaped to about 5% of a ship's value, roughly five times early-war levels, per the Insurance Journal
• Insuring a $100 million tanker now costs about $5 million per transit-week, with rates repriced every 24 to 48 hours
• On 7 July the Qatari LNG carrier Al Rekayat and Saudi supertanker Wedyan were struck, with Al Rekayat evacuated after an engine-room fire

The naval coalition monitoring the Strait of Hormuz has raised its shipping advisory to 'severe', the highest category, after Iranian attacks on three more tankers this week. War-risk insurance for the waterway has climbed to about five percent of a vessel's value, a level that makes most commercial transits uneconomic. The world's most important oil artery is now, in practical terms, closing itself.

The alert level nobody wanted

The US Navy-led Joint Maritime Information Center lifted its advisory for Hormuz transits from 'substantial' to 'severe', citing the likelihood of 'deliberate hostile action' under current conditions, The New Arab reported. It is the first time since mid-June that the strait has carried the top classification. The JMIC advisory guides shipowners, charterers and underwriters across the global tanker trade.

The upgrade followed a night of attacks on 14 July. The Norwegian-owned chemical tanker Stolt Magnesium was hit by a projectile northeast of Qalhat at 00:40, according to maritime coverage cited by Al Jazeera. Shortly afterwards, cruise missiles struck two UAE-owned tankers, the Mombasa B and Al Bahyah, inside the strait.

A week of hits on Gulf shipping

The 14 July attacks extended a pattern. On 7 July, projectiles struck the Qatari-owned LNG carrier Al Rekayat and the Saudi-flagged supertanker Wedyan. Both were damaged, and Al Rekayat's crew was evacuated after a fire in the engine room, according to Wikipedia's crisis chronology, which aggregates wire reporting. Those attacks helped collapse the US-Iran truce a day later.

US forces have also used force at sea. NPR reported that American units fired on a tanker accused of attempting to break the blockade of Iranian ports. Between Iranian missiles and American blockade enforcement, neutral shipping faces threats from both directions in the same narrow waterway.

Insurance is the strait's real gatekeeper

War-risk cover is sold on a seven-day basis and repriced every 24 to 48 hours, the Insurance Journal reported. Premiums have leaped to roughly five percent of hull value, about five times the level seen in the war's earliest days. Insuring a $100 million tanker for a single week in the zone now costs about $5 million.

At those rates, economics do what mines and missiles cannot. Shipping traffic through Hormuz is at near-standstill levels, with most owners refusing berths in the Gulf, according to The New Arab and industry trackers. The World Economic Forum noted earlier this year that governments are increasingly stepping in as insurers of last resort to keep essential cargoes moving.

• About one-fifth of global oil and a major share of LNG normally transits Hormuz
• War-risk premiums: roughly 5% of hull value, repriced every 24-48 hours
• JMIC advisory: 'severe', its highest level, for the first time since mid-June
• Iraq's Hormuz oil exports fell from about 93 million barrels a month pre-war to 10 million in April

Energy security beyond the oil price

The strait's paralysis is reshaping energy flows beyond headline crude prices. Iraq, which depends on Basra terminals inside the Gulf, saw Hormuz exports collapse from roughly 93 million barrels a month before the war to 10 million in April, Reuters reporting cited by regional outlets shows. Qatari LNG, which cannot reroute, faces the same chokepoint.

Buyers in Asia carry the heaviest exposure. India, China, Japan and South Korea take the bulk of Gulf crude and LNG, and every insurance surcharge lands eventually in their import bills. European gas markets, already tight, are watching Qatari cargo schedules as a leading indicator of a winter supply squeeze.

Can the strait reopen?

Al Jazeera's analysts argue that no insurance market will normalise while Iran retains both the capability and the declared intent to strike shipping. Tehran calls American interference in Hormuz its 'invincible red line', while Washington insists its strikes aim to protect vessels. Each new attack resets the seven-day insurance clock at a higher price.

The June memorandum of understanding explicitly required reopening the strait to all shipping as part of a final deal. That clause is now the clearest measure of how far the war stands from resolution.

What to watch next

Watch three signals: whether JMIC's 'severe' rating persists past this week, whether governments expand state-backed war-risk schemes, and whether attacks spread to the Bab el-Mandeb, as Houthi officials have threatened. Foreign Policy reported the group may act if Gulf states join the war directly. A two-strait crisis would leave Asian importers with no good route at all.

Sources

• The New Arab - Hormuz strait on 'severe' alert as insurance costs soar (Jul 2026)
• Insurance Journal - Shipping insurance costs to cross Hormuz soar after vessel attacks (2026)
• Al Jazeera - When will Strait of Hormuz be safe for commercial shipping again? (28 Apr 2026)
• World Economic Forum - What stopping war-risk insurance in the Strait of Hormuz tells us (Apr 2026)