Iran Activates Two-Strait Energy Vise as Houthis Threaten Bab el-Mandeb Blockade
Coordinated threats to Hormuz and Bab el-Mandeb straits put 25% of global oil supply at risk, with jet fuel prices doubled and commercial flights already suspended.
Iran and its Houthi proxy in Yemen are executing a coordinated blockade strategy targeting two critical energy chokepoints simultaneously — the Strait of Hormuz and Bab el-Mandeb — creating what analysts describe as the largest energy supply disruption in history.
On April 19, 2026, no tankers passed through the Strait of Hormuz for the first time since Iran reimposed maritime restrictions the previous day, according to CNN tracking data. That same weekend, Houthi military official Abed al-Thaur publicly stated Yemen would “use the trump card of closing the Bab al-Mandab Strait to American and Israeli ships,” per TIME. The twin threats represent a strategic escalation beyond proxy warfare into direct infrastructure targeting — one that has already forced Air Canada to suspend New York JFK routes and sent Oil Prices toward triple digits.
22-25%
$96.88 (+7%)
$10B
+100%
The coordination is no accident. A senior Iranian official told Reuters that “if the situation gets out of control, Iran’s allies will also close the Bab El-Mandeb Strait,” explicitly framing the straits as joint leverage points. Iran’s First Vice President Mohammad Reza Aref reinforced the message on April 20: “One cannot restrict Iran’s oil exports while expecting free security for others,” according to Haaretz. The same day, Iranian forces launched drone attacks on U.S. Navy vessels in the Sea of Oman after American forces seized the Iranian commercial ship M/V Touska attempting to bypass U.S. blockade measures.
Chokepoint Arithmetic
The Strait of Hormuz normally carries 20 million barrels of oil per day — roughly 20-25% of global seaborne crude, per IEA data. Bab el-Mandeb handles 4.8 million barrels daily and 12% of global maritime trade, valued at approximately $700 billion annually. Combined, a simultaneous closure would block $10 billion in daily trade and force approximately 30% of global container Shipping onto 10-14 day detours around the Cape of Good Hope, adding $1 million per round-trip voyage in fuel costs alone, according to The Middle East Insider.
The disruption is already measurable. Global oil supply plummeted 10.1 million barrels per day in March 2026 — the largest single-month drop in history — with OPEC+ production falling 9.4 million barrels per day, the IEA reported in its April market update. West Texas Intermediate crude briefly touched $104.88 per barrel on April 13 following the initial blockade announcement, while Brent reached $96.88 on April 19. Goldman Sachs and Wood Mackenzie analysts project prices could breach $120 per barrel if the blockade continues, with doomsday scenarios reaching $200 if the Houthis fully close Bab el-Mandeb, per FinancialContent.
“This is a historic disruption to world oil. There has never been anything of this scale. Even the oil crises of the 1970s, the Iran-Iraq war of the 1980s, Iraq’s invasion of Kuwait in 1990 — none of those come close to the magnitude of this disruption.”
— Daniel Yergin, Vice Chairman of S&P Global
Military Escalation and Operational Reality
The threat has moved from rhetoric to kinetic action. Iranian forces launched coordinated drone strikes on U.S. military vessels in the Sea of Oman on April 19-20, following the U.S. Navy’s seizure of the Iranian-flagged cargo ship M/V Touska, which was attempting to reach Bandar Abbas. U.S. forces fired on the vessel, disabling its navigation systems, according to Iran International. The strikes represent Iran’s most direct military engagement with American naval forces since the conflict began in late February.
Meanwhile, the USS George H.W. Bush carrier strike group was forced to take a 6,000-mile detour around the Cape of Good Hope in mid-April, bypassing Bab el-Mandeb entirely due to Houthi missile threats, Defence Security Asia reported. The reroute demonstrates that even U.S. carrier battle groups now view the strait as operationally compromised — a strategic concession with implications far beyond commercial shipping.
Commercial Fallout Accelerates
Air Canada announced on April 17 that it would suspend all flights from Toronto and Montreal to New York JFK from June 1 through October 25, citing jet fuel costs that have doubled to $4.32 per gallon since the conflict began. The airline stated that “some lower-profitability routes and flights are no longer economic,” according to Bloomberg. IEA head Fatih Birol warned that Europe has “maybe six weeks” of remaining jet fuel supplies at current consumption rates.
U.S. gasoline prices reached $4.05 per gallon on April 20, with the IEA warning they may not drop below $3 per gallon until 2027, CNN reported. The price surge has triggered the largest coordinated release of Strategic Petroleum Reserves in history — 400 million barrels total, including 172 million from U.S. stockpiles alone.
The dual-strait threat exploits geography that leaves no viable alternatives. While ships can reroute around Africa to bypass Bab el-Mandeb (adding 10-14 days), there is no detour around Hormuz for Persian Gulf oil. Iran’s parliamentary construction committee announced draft legislation on April 19 to formalise Hormuz management, banning Israeli-linked ships and imposing rial-denominated transit fees on vessels from hostile states. The legal framework suggests Iran views the strait not as a temporary bargaining chip but as permanent economic leverage.
Strategic Petroleum Reserve Depletion
The 400 million barrel SPR release announced in mid-April represents roughly 40% of total global strategic reserves. The U.S. contribution of 172 million barrels leaves American emergency stockpiles at their lowest level since 1984, according to Department of Energy data cited by FinancialContent. The releases have provided only temporary price relief — Brent crude remained 7% higher on April 19 despite the intervention, suggesting markets view the supply disruption as structural rather than transient.
IEA chief Fatih Birol described the crisis as “the greatest global energy security challenge in history,” per CNBC. The assessment reflects not just the scale of the disruption but its duration — unlike the 1973 oil embargo or 1990 Gulf War, which lasted months, the current crisis shows no clear resolution path as long as the broader Iran conflict continues.
| Event | Supply Lost (mb/d) | Duration | Price Impact |
|---|---|---|---|
| 1973 Arab Oil Embargo | 4.4 | 5 months | Oil quadrupled to $12/bbl |
| 1979 Iranian Revolution | 5.6 | 6 months | $40/bbl (1980 dollars) |
| 1990 Iraq Invasion of Kuwait | 4.3 | 7 months | Doubled to $40/bbl |
| 2026 Iran Dual-Strait Crisis | 10.1 (March alone) | Ongoing (8+ weeks) | $96-105/bbl (+70-90%) |
What to Watch
The next 30 days will determine whether this remains a pricing crisis or becomes a supply catastrophe. Three tripwires matter most: whether Houthis move from threats to actual kinetic blockade of Bab el-Mandeb (mining, anti-ship missile deployments); whether Iran’s new Hormuz management law passes parliament and begins enforcement; and whether SPR releases can continue at current pace without depleting reserves below critical thresholds. Commercial indicators — European jet fuel inventory levels, Asia-Europe shipping route selections, and insurance premium spreads — will signal market expectations faster than diplomatic rhetoric. If Air Canada’s suspension proves the first of many airline route cancellations, or if container shipping lines abandon direct Asia-Europe routes entirely in favour of Cape reroutes, markets will price in a multi-quarter disruption regardless of ceasefire negotiations. The dual-strait vise is now operational; the question is whether it tightens further or holds at current pressure.