The Houthi control of the Bab al-Mandeb Strait poses a direct threat to global oil supplies, and the impact is already being felt in consumer prices. The U.S. retail price of diesel has hit an all-time high above $6.51 a gallon, a politically sensitive issue for President Trump ahead of midterm elections in six weeks. Saudi Arabia has been using the Red Sea route to transfer oil to ships in the Indian Ocean for delivery to Asian customers, helping to cap global crude prices near $100 a barrel, but that route is now under threat. The wider conflict has also drawn in other Iranian allies, with reports that the Houthis have coordinated with Iraqi militias to launch drone attacks on Saudi oil facilities.

The current escalation echoes earlier crises in the region, but the stakes are higher now because the Strait of Hormuz is also effectively shut down by Iran. If both chokepoints were disrupted simultaneously, the impact on global supply chains could be catastrophic. The Houthis' capture of the Red Sea coast has also brought them closer to the U.S. military base in Djibouti, raising concerns about regional stability. The outcome of the battle for the highlands could determine control of Yemen's coastline and the security of a key global shipping lane.