The Mandeb Strait and Hormuz Under Pressure Simultaneously: Saudi East-West Pipeline Attack Exposes a New Phase of Energy Warfare

[Amman Observer] On September 15, the core issue of energy security in the Middle East is no longer a single tanker, a single strait, or a single attack, but rather the backup system that Saudi Arabia is trying to use to bypass Hormuz is itself coming under pressure. Al Jazeera reported that the Houthi forces have recently seized Greater Hanish Island, Lesser Hanish Island, and the Red Sea port of Mocha, pushing their control line towards the vicinity of the Mandeb Strait; at the same time, the Saudi East-West oil pipeline was forced to shut down after a drone attack, and future passage remains uncertain. This means that the two export options originally used by Riyadh to avoid the risks of Hormuz—the overland pipeline to Yanbu and the route through the Red Sea and Mandeb Strait—are both under pressure simultaneously.

Core Facts and Verification Status

• Domestic Attacks in Saudi Arabia: Al Jazeera reported on September 15 that the Saudi-led coalition stated that the Houthis launched missile and drone attacks on Khamis Mushait, Abha, and Taif, resulting in 13 civilian injuries, damage to 7 residential buildings, and 2 vehicles; coalition spokesman Turki al-Maliki stated they would respond "responsibly and firmly."
• Security Alerts: Al Jazeera reported on September 14 that Saudi civil defense agencies had issued alerts around Abha and Khamis Mushait, which were later lifted. The original page of Reuters on September 15 regarding "wide-ranging security alerts" is visible but intercepted by DataDome, and the full text cannot be directly retrieved; this article only uses it as a lead for verification.
• Advancement along the Red Sea Coast: Al Jazeera stated that the Houthis seized Greater/Lesser Hanish Islands, Mayyun Island, and the Mocha front, while government forces counterattacked in the western Taiz, Dhubab, and al-Khokha directions. Al Jazeera also noted that it could not independently verify some battlefield claims, so this article refers to the islands and frontline control as "reported/claimed by various parties."
• East-West Pipeline: Al Jazeera quoted regional officials and AP reports stating that a key Saudi oil pipeline was attacked last week, and repairs may take 3 to 5 weeks; Al Jazeera also stated on September 15 that this approximately 1,200-kilometer pipeline carries oil from the eastern Gulf coast to Yanbu in the Red Sea, accounting for about 4% of global oil supply export routes.
• Humanitarian Data: UNHCR reported via Al Jazeera/AFP that the fighting on the west coast has displaced over 100,000 people, with more than 2,400 crossing the Mandeb Strait to reach Djibouti in the past 4 days; OCHA reported via Al Jazeera that at least 18,000 households, approximately 125,000 people, have been displaced since September. User-provided UN News/WHO/IOM data—2,883 casualties since August 6, 93,864 newly displaced individuals, and 7 medical facilities or assets damaged/disabled/directly attacked within 10 days—currently cannot be directly linked to the original page and is marked as pending confirmation but aligns with the public stance of the UN system.

This Is Not Just Another Tanker Incident Report

The reports from September 13 to 15 regarding Hormuz and individual tankers focus on a single shipping incident. Today's escalation is different: the actions of the Houthis have shifted the pressure from "shipping lane risks" to "risks to Saudi export systems." The logic for Saudi Arabia has been clear: if Hormuz is pressured by Iran, crude oil can be diverted through the East-West pipeline to Yanbu and then enter the international market via the Mandeb Strait. The current issue is that the East-West pipeline has been attacked, and Houthi advances are occurring around the Mandeb Strait. Militarily, this is called the failure of redundant channels; politically, it means Riyadh is forced to acknowledge that alternative routes are also within the range of enemy firepower and proxy networks.

The Value of the Mandeb Strait Is Rising

Al Jazeera reported on September 14 that the Mandeb Strait typically carries about 12% of global trade, 11% of seaborne oil, and 8% of liquefied natural gas. This figure alone should alert any general staff; after Hormuz has been severely disrupted due to the US-Iran conflict, its significance has been magnified. Hormuz is the eastern gate for Gulf countries, while the Mandeb Strait is the southern gate for Red Sea exports. If both gates are under pressure, Saudi Arabia, the UAE, and even Egypt's Suez revenues will face a chain reaction.

From a military perspective, the Houthis do not need to completely blockade the Mandeb Strait. They only need to push the insurance costs, rerouting costs, escort demands, and market psychology to a level that cannot be ignored to achieve the effects of economic warfare. Maritime channels are not bridges; they cannot be held by a single armored brigade; they are priced based on continuous risk perception. The Houthis understand this, and so does Iran.

Saudi Arabia Faces an Old Problem of Capability Triangles

Saudi Arabia possesses F-15s, Typhoons, air defense systems, and a long-term American training framework, but this crisis has once again exposed the institutional shortcomings within the "equipment, training, and systems" triangle. Air defense can intercept some missiles, and drone defense can protect some bases, but a national-level energy artery requires cross-domain early warning, pipeline depth protection, intelligence on the Red Sea coastline, coordination with Yemeni proxy forces, and an export scheduling mechanism during crises. Buying weapons is easy, but establishing a reliable system for a 1,200-kilometer pipeline, ports, island routes, and urban air defense simultaneously is difficult.

Al Jazeera reported that the Saudi-Turkish-Pakistani "Mecca Joint Defense Agreement" signed in August is being tested for its actual value by this crisis. The Pakistani defense minister stated that if the Yemen conflict spills over into Saudi Arabia, the agreement could be activated. However, the agreement is written on paper; the real question is whether Islamabad or Ankara is willing to take direct risks in the Yemeni battlefield, Red Sea escort, or Saudi domestic defense. There is an old saying in Arab militaries: there are many allies on paper, but few under fire.

Both the US and Iran Are Being Influenced by This Red Sea Front

The negotiations regarding Hormuz have been delayed due to the situation in Yemen, which is very critical. Al Jazeera quoted Reuters reporting that the Iranian Foreign Ministry stated that discussions on strait affairs originally scheduled to be held in Oman have been postponed due to the "Yemen incident," and that Saudi Arabia requested the delay. Tehran publicly denies intervening in Yemen, but the battlefield effects do not require public acknowledgment: the Houthis are increasing pressure in the Red Sea, Iran is maintaining pressure in Hormuz, and the US and Gulf countries must disperse their political and military attention in two directions.

For Washington, the situation is equally awkward. If the US directly strikes the Houthis, the front expands; if it does not strike, Saudi Arabia will doubt the US security commitment; if it negotiates directly with the Houthis, it will grant them political recognition. Al Jazeera reported that US Vice President JD Vance acknowledged that Washington is communicating with the Houthis and regional allies. For the Houthis, this itself is a gain: they have transformed from armed groups in the Yemeni mountains into actors in the Red Sea capable of forcing the US, Saudi Arabia, and Iran to adjust their agendas.

Observation Points for the Next 24 to 72 Hours

• Pipeline Recovery Window: If the East-West pipeline repairs indeed take 3 to 5 weeks, oil prices and Saudi export schedules will continue to be under pressure; if Saudi Arabia can quickly restore some transport, market panic will decrease.
• Stability of Houthi Island Control: Greater/Lesser Hanish and Mayyun Island are in sensitive locations but have weak supply lines. Seizing them does not equal holding them, especially under Saudi airstrikes and government counterattacks.
• Scale of Saudi Retaliation: Limited airstrikes will maintain the intensity of the conflict; if it expands to coastal landings, blockades, or deeper target strikes, the Red Sea battlefield may enter a new phase.
• Whether Hormuz Negotiations Resume: If the Oman channel remains stalled, it indicates that the Yemeni front has become a substantive variable in US-Iran/Gulf negotiations, rather than a peripheral battlefield.
• Humanitarian Pressure: If UNHCR/OCHA numbers continue to rise, the flow of refugees towards Djibouti and the medical system on the west coast will become a second crisis line outside of military operations.

Conclusion

The true meaning of this escalation is that Saudi energy security has shifted from "bypassing Hormuz through alternative channels" to "the alternative channels themselves also need defense." The Houthis do not need to defeat the Saudi Air Force, nor do they need to completely close the Mandeb Strait; they only need to prove that Saudi Arabia's alternative routes are equally vulnerable, which is enough to change calculations in the market, alliances, and at the negotiating table. Riyadh has spent years building an export logic to bypass Hormuz, and now it finds that the Red Sea exit is not a backdoor, but another door that also needs guarding.

Sources

• Al Jazeera, 15 Sep 2026, Saudi Arabia faces high-stakes choices as war with Houthis escalates.
• Al Jazeera, 15 Sep 2026, Saudi Arabia promises to respond to Houthi attacks firmly.
• Al Jazeera, 15 Sep 2026, Can the Houthis hold on to Yemen’s strategic western coast?
• Al Jazeera/AFP/UNHCR, 15 Sep 2026, More than 100,000 displaced as they flee violence in Yemen.
• Al Jazeera/AP, 14 Sep 2026, Yemen forces advance in Taiz; Houthis take key islands, attack Saudi Arabia.
• Al Jazeera/Reuters, 14 Sep 2026, Strait of Hormuz talks postponed due to Yemen events, says Iran.
• Reuters 15 Sep 2026 page is visible but original text retrieval 401, details regarding "Saudi wide-ranging security alerts" pending original text verification.
• UN News/WHO/IOM/OCHA data provided by task leads, currently unable to directly link to the original page, marked as pending confirmation.