Iran Threatens to Close Critical Red Sea Trade Route Amid Regional Tensions

2026-04-06 region

Red Sea, 6 April 2026
Iran has warned it may shut the Bab al-Mandab Strait through its Houthi allies, potentially disrupting 16% of global seaborne trade. Senior advisor Ali Akbar Velayati declared on 5 April that Iran views the strait ‘as it does Hormuz,’ referencing the Persian Gulf chokepoint already effectively closed during ongoing US-Iran hostilities. The 32-kilometre-wide passage connects the Red Sea to the Indian Ocean, serving as a vital alternative to the Suez Canal for Asian-European trade routes and carrying 10% of global oil shipments.

Escalating Threats Build on Earlier Trade Disruptions

This latest threat compounds existing shipping disruptions that have already severely impacted East African exporters. As previously reported, Kenya’s tea industry has faced significant losses, with eight million kilograms of tea trapped at Mombasa port since March 2026, costing the sector £6.4 million weekly [alert! ‘referencing previous article context’]. The Middle Eastern markets, which typically absorb 25% of Kenya’s tea exports, remain completely inaccessible due to ongoing regional conflicts. Iran’s new warning to potentially close the Bab al-Mandab Strait threatens to extend these disruptions far beyond individual countries, affecting the entire Horn of Africa region that depends heavily on imported fuel and food supplies.

Strategic Importance of the Bab al-Mandab Chokepoint

The Bab al-Mandab Strait represents one of the world’s most critical maritime passages, with approximately 16% of all global seaborne trade flowing through its waters [1]. The strait’s strategic value extends beyond general commerce, as it accounts for roughly 10% of global oil transport and 25% of worldwide container trade [2]. The passage consists of two channels: a western channel measuring 26 kilometres across with a depth of 200 metres, which international shipping primarily utilises, and a narrower eastern channel just 3 kilometres wide and 30 metres deep [2]. This geographical configuration makes the strait particularly vulnerable to disruption, as vessels carrying commodities including grain, raw materials, and manufactured goods must navigate through these confined waters [2].

Iran’s Coordinated Approach Through Proxy Forces

Iran’s threat leverages its established relationship with Yemen’s Houthi forces, who have previously demonstrated their capacity to disrupt Red Sea shipping. Ali Akbar Velayati, Senior Advisor to Iran’s Supreme Leader on Foreign Affairs, stated on 5 April 2026 that ‘the unified command of the Resistance front views Bab al-Mandeb as it does Hormuz’ [1]. This reference to the Strait of Hormuz carries particular weight, as Iranian Revolutionary Guards announced the closure of that Persian Gulf passage to US and Israeli-linked vessels in February 2026 [4]. The Houthis had already attacked Israel-linked ships in the Red Sea during 2023 and 2024 in response to the Gaza conflict [3][5], causing shipping traffic through the Bab al-Mandab to fall below 50% of normal capacity [2]. Although Houthi leaders agreed to a ceasefire with the United States in May 2025, traffic had only marginally recovered by early 2026 due to renewed fears surrounding the current Iran conflict [2].

Regional Economic Consequences and Timeline Pressures

The timing of Iran’s warning coincides with escalating diplomatic tensions, as US President Donald Trump had issued Iran a 48-hour ultimatum that expired on 6 April 2026 [1]. The potential closure threatens to create cascading economic effects throughout the region, particularly impacting East African nations that rely on the strait for essential imports. Historical precedent exists for such disruptions: during the 1973 Yom Kippur War, Egyptian ships coordinated with South Yemen to blockade oil tankers bound for Israel through the strait [2]. Any sustained closure would force shipping companies to reroute vessels around Africa’s Cape of Good Hope, significantly increasing transit times and costs. The threat materialised as Houthi forces launched rocket attacks against Israel on 4 April 2026, marking the first assault from Yemen since the current conflict began [6], though Israeli forces successfully intercepted the projectiles before they reached their targets.

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shipping routes regional trade