The Hanish Islands and the Red Sea Squeeze

Hanish changes the geometry of the Red Sea

For years, analysts treated the Houthi threat to Red Sea shipping as something asymmetric—missile drones, small boats, the occasional anchored vessel hit. Seizing territory was never the playbook. The takeover of Greater and Lesser Hanish this week breaks that pattern.

The islands sit in the southern Red Sea, not far from the approach to the Bab el-Mandeb Strait, the narrow passage that connects the Red Sea to the Gulf of Aden and, beyond it, the Indian Ocean. Control of Hanish does not close the strait—that would require more than a few rock outcrops—but it extends the Houthi kill zone outward and gives the group a physical staging ground from which to monitor, interdict, or disrupt traffic that has been rerouted since Iran effectively shut the Strait of Hormuz earlier in the conflict.

This matters because the Hanish grab arrives on top of a cascade of losses for Saudi-backed government forces. Last week the Houthis took the port of Mokha and another strategic island. This week they add the Hanish pair. The sequence matters: Mokha is a gateway port on the Yemeni Red Sea coast, Hanish dominates the offshore waters. Together they form a pincer over the approaches to the Bab el-Mandeb from the Yemeni side.

The pipeline timing is brutal

While the Houthis expanded their territorial footprint, a separate but linked blow landed on Saudi energy infrastructure. A strike on September 10 damaged the East-West Pipeline, the artery that moves crude from Saudi Arabia’s eastern Gulf fields to pumping stations on the Red Sea coast for export. Regional officials briefed under condition of anonymity said repairs could take three to five weeks and may include a major pumping facility. The line might run partially during that window, but that is a half measure at best.

The timing is the uncomfortable part. Iran’s closure of the Strait of Hormuz—the normal route for most Saudi exports—forced Riyadh to lean harder on the Red Sea corridor. The East-West Pipeline was never just a fallback; it was the contingency that made the contingency credible. With Hanish in Houthi hands and the pipeline degraded, Saudi Arabia now faces a Red Sea export route that is both physically vulnerable and logistically constrained.

China, the region’s largest oil importer, called Houthi attacks on Saudi energy infrastructure unacceptable and signaled deep concern about escalation. That wording matters. Beijing has tolerated a lot in Yemen to keep the door open for energy deals; it has not tolerated attacks on the supply chains it depends on. If Beijing pushes Riyadh for a de-escalation path, the leverage is no longer one-sided.

What the seizure says about Houthi capability

The Hanish operation is not just a land grab. It is a capability demonstration.

Taking and holding offshore islands requires navigation, amphibious planning, and a degree of logistical sustainment that rebel forces rarely display. It also requires confidence that the move will not trigger a decisive kinetic response from a superior naval power. The fact that the Houthis acted while Saudi forces were attempting to claw back ground suggests they judged the risk environment favorable—perhaps because the U.S. and its allies are stretched across multiple theaters, or because they believe the political cost of a major counterstroke is too high.

The calculus is visible in the surrounding geography. With Mokha secured, a new island claimed, and now Hanish, the Houthis control the western shore of the southern Red Sea from a point north of Aden to the strait itself. They do not yet threaten the deep-water shipping lanes in the central Red Sea where large tankers transit, but they now dominate the approaches where vessels slow, where coastal traffic concentrates, and where the Saudi pipeline lands.

That is a different kind of leverage than sinking a tanker. It is the leverage of denial—making a route usable only at a premium, and then pricing that premium into every shipment that passes within range.

Saudi and Iranian diplomacy at an awkward angle

The diplomatic row over the Strait of Hormuz adds a layer of friction between Riyadh and Tehran that is almost theatrical. Iran’s foreign ministry spokesman said Saudi Arabia had demanded that an Oman-hosted meeting on Hormuz security be scrapped, and accused Riyadh of filing amendments that would undermine the agreement. Saudi concerns, according to a Gulf official, centered on the deal’s implications for other Gulf Cooperation Council states.

The irony is plain. Iran closed the Strait of Hormuz and forced Saudi Arabia into the Red Sea corridor. Saudi Arabia then became dependent on that corridor. The Houthis, an Iran-aligned force, seized the islands that guard it. Riyadh is now arguing with Tehran over paper while its own export route is threatened by Tehran’s proxies.

Iran’s nuclear standoff with the West runs in parallel. Austria refused visas to Iran’s nuclear chief and other delegation members for the IAEA conference in Vienna, citing reinstated U.N. sanctions. Iran called the decision unjustified and blamed U.S. pressure. U.S. Energy Secretary Chris Wright accused Iran of failing to cooperate with inspectors and said accountability was overdue. The IAEA session in Vienna, where Wright also defended the rigor of the U.S.-Saudi nuclear accord, is a stage for these conflicts to play out without resolving any of them.

The human cost is accelerating

Behind the geopolitics is a population in flight. The International Organization for Migration said nearly 94,000 people have displaced themselves since fighting escalated this month, with Taiz and Lahj provinces bearing the brunt. More than 2,000 have crossed into Djibouti. Around 200 schools have been converted into shelters. The World Health Organization put the death toll at more than 500 in a single week ending Saturday, a sharp jump.

The trajectory is toward civil war. The 2022 ceasefire held long enough to give the impression of stabilization; it is now fraying fast. If the Houthis consolidate around the Red Sea coast, they will have both the terrain and the leverage to press further inland or to negotiate from a position of strength. Either outcome deepens Yemen’s fragmentation.

What happens next

Three scenarios deserve attention.

First, Saudi Arabia attempts a limited counterstroke against Hanish to reopen the corridor. That risks escalation with the Houthis and potentially invites Iranian retaliation elsewhere. It also risks turning the Red Sea into a contested maritime battlefield rather than a congested shipping lane.

Second, Riyadh accepts the degradation, runs the pipeline at partial capacity, and absorbs higher insurance and transit costs. This is the quieter path and the more likely one in the short term. It shifts pressure onto global oil prices and gives Iran additional leverage through its proxy.

Third, the Houthis push further, aiming to close the Bab el-Mandeb entirely. That would transform the conflict from one of harassment to one of blockade. The international response would be immediate and forceful, but the pathway to that point may already be open.

The Hanish Islands were rocks on a map before this week. They are a piece of leverage now. In a conflict where territory has always been currency, the Houthis just printed more of it.