Yemen’s Houthi militant group has heightened tensions in the Middle East by threatening to blockade Saudi Arabian oil shipments through the Red Sea, potentially disrupting a critical global energy route. The Houthis announced a maritime blockade on Saudi Arabia on Monday, targeting the Bab al-Mandab Strait, a strategic waterway at the southern end of the Red Sea linking the Red Sea to the Gulf of Aden.

Saudi Arabia has increasingly relied on shipping oil through the Bab al-Mandab since the war involving Iran escalated earlier this year, forcing the kingdom to divert much of its crude away from the Strait of Hormuz, the traditional but now heavily contested Persian Gulf chokepoint. Before the conflict, Saudi exports through the Red Sea port of Yanbu averaged about one million barrels per day; since March, that number has risen to approximately 3.6 million barrels daily, mostly destined for buyers in Asia, including South Korea, Japan, and China.

The Houthi blockade declaration has already had practical effects. Two oil tankers loaded with Saudi crude reversed course mid-Red Sea and headed north toward the Suez Canal, a longer and more expensive route to Asia. Additional vessels in the Gulf of Aden also changed their direction in response to the threat. Maritime data firms estimate that daily tanker traffic through the Red Sea has increased substantially since the war but remains below pre-2023 levels, with current crossings around 55 to 60 percent of earlier volumes.

The Houthis’ control of parts of Yemen’s coastline adjacent to Bab al-Mandab gives them the capability to disrupt shipping. Historically, the group has attacked ships in this area, particularly since late 2023, and continues to deploy missiles and other weaponry along the coast. Saudi Arabia has expressed serious concern over these developments due to the ease with which the Houthis could halt traffic through this narrow waterway, impacting global oil supply chains.

The announcement of the blockade amplifies existing strain on global energy markets already disrupted by the conflict between the United States and Iran. Recent U.S. strikes against Iranian targets and retaliatory actions by Tehran, including attacks on U.S. sites in the Gulf region and a tanker in the Strait of Hormuz, have significantly reduced traffic through that critical chokepoint to just a fraction of its usual volume. This has forced Saudi Arabia and other energy producers to seek alternative routes, with Bab al-Mandab playing a key role.

Oil markets have reacted cautiously. Brent crude prices rose above $90 a barrel this week, with increases attributed to geopolitical risks, though other factors, such as reduced oil demand in China and higher production in the United Arab Emirates, have kept price jumps moderate. Some analysts warn, however, that any actual attack on tankers or infrastructure in the Red Sea could have a chilling effect on shipping, potentially causing sharper price spikes. A consulting firm economist noted that even a single strike on a vessel could deter shipowners and crews from transit, further jeopardizing supply chains.

Should the Bab al-Mandab Strait become too risky for shipping due to Houthi attacks or blockades, Saudi Arabia could reroute supplies through the Suez Canal or an Egyptian pipeline leading to the Mediterranean. However, these alternatives face logistical, capacity, and cost challenges. The pipeline cannot handle current export volumes, and larger crude tankers are often too deep to safely navigate the Suez Canal fully loaded. Additionally, rerouting through this northern passage could add up to four weeks to delivery times.

The situation comes amid heightened military activity in the region. U.S. forces recently conducted strikes in southern and western Iran, leading to retaliatory attacks by Tehran on U.S. bases in Bahrain, Kuwait, and Jordan. The escalating conflict has resulted in significant U.S. defense expenditures, with the Pentagon reporting war-related costs of $37.5 billion as of mid-2026.

Despite the new threats, some analysts remain cautiously optimistic. Previous intense confrontations between Saudi Arabia and the Houthis, including a two-month U.S. military campaign against the Houthis in 2025, ended in ceasefires without a sustained maritime blockade of Saudi oil shipments. This history provides some hope that the Houthis may avoid attacking vital Saudi-linked vessels directly. Nevertheless, ongoing hostilities and the risk of overlapping disruptions at both Bab al-Mandab and the Strait of Hormuz pose significant concerns for global energy markets.

Meanwhile, disruptions in another critical oil corridor, the Black Sea, have compounded supply challenges. Ukrainian strikes on Russian shipping near the port of Novorossiysk have hampered crude flows from a pipeline carrying Russian and Kazakh oil. These attacks have prompted cautionary calls from the U.S. government to Kyiv to avoid targeting non-Russian vessels.

Overall, the confluence of escalating conflict and targeted threats along multiple maritime chokepoints underscores the fragility of global oil supply routes and the potential for significant price volatility if hostilities intensify or supply alternative routes remain constrained.