Yemen’s Houthi rebels have declared a naval blockade on Saudi oil shipments through the Bab el-Mandeb strait, forcing tankers to reverse course and pushing Brent crude prices above $100 a barrel on Thursday. This escalation marks a significant new front in the ongoing conflict between the United States and Iran.
Market Volatility and the Red Sea Blockade
The global energy market is grappling with the dual pressure of the Strait of Hormuz closure and the newly declared Houthi blockade at the Bab el-Mandeb. On Thursday, Brent crude futures surged $6.58, or 6.96 percent, to reach $100.65 a barrel, crossing the $100 threshold for the first time since late May. Analysts observe that while crude continues to move, the blockade is dictating the flow of Saudi exports based on tanker affiliation rather than cargo content.
The disruption has been immediate. Two Chinese supertankers, the Xin Long Yang and Cosnew Lake, exited the Red Sea on Thursday after initially pausing their transit, according to shipping data analyzed by Reuters. Other vessels, however, have not been as fortunate. The Houthis reported attacking two Saudi tankers, with the Saudi news agency SPA confirming that the vessel Encelia was set ablaze in the Red Sea.
U.S. and Iranian Escalation
The maritime threats follow a broader deterioration of the U.S.-Iran relationship. U.S. Secretary of State Marco Rubio, speaking from Manila, characterized the Houthi involvement as a strategic error orchestrated by Tehran. The Houthis largely were smart and stayed out of all this throughout the conflict, but they now apparently have gotten themselves suckered into this, going after Saudi Arabia and their ships,
Marco Rubio, US Secretary of State said.

Rubio further accused the Iranian government of reneging on peace commitments, stating they would pay the price for it
Marco Rubio, US Secretary of State. This sentiment is mirrored in the U.S. military’s posture. While the U.S. has not committed to defending Saudi commercial ships directly, President Donald Trump has warned that the U.S. will intervene if the Bab el-Mandeb is fully obstructed. If something like that happens, we take care of it,
President Donald Trump remarked.
The Strategic Impact on Saudi Exports
For Saudi Arabia, the Bab el-Mandeb represents a critical alternative route that has been essential since the Strait of Hormuz became effectively impassable. Maritime risk management group Vanguard noted that the recent diversions represent the first confirmed changes to commercial tanker routing following the Houthi embargo.
Domestic energy costs in the United States are already reflecting these supply constraints.
Uncertainty in the Bab el-Mandeb Corridor
Despite the heightened military activity, the situation remains fluid. Windward analyst Michelle Bockmann noted that the Houthis appear to be calibrating their enforcement based on the perceived affiliation of the vessels. The Houthis are quite mercurial and there is no complete clarity on what the blockade means,
Michelle Bockmann, senior maritime intelligence analyst stated.
As of late July 2026, the international community is watching for signs of diplomatic de-escalation. The nightly exchange of strikes between U.S. forces and Iranian-backed entities continues to dominate the region. Observers are now monitoring whether China, a major importer of Saudi crude, will adjust its reliance on these tankers or if the Houthi blockade will force a longer-term rerouting of global energy supplies around the African continent.
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