Why the Strait of Hormuz matters so much in the Iran war

Why the Strait of Hormuz Matters in the Iran War

The recent agreement between Iran and the United States to halt hostilities hinges on ensuring unimpeded movement through the Strait of Hormuz. For weeks, Tehran had restricted access to this critical maritime route, which serves as a lifeline for global energy supplies. The strait’s closure during tensions triggered a surge in fuel prices, but its reopening led to a 15% drop in oil costs within days.

A Strategic Waterway

Located between Iran and the United Arab Emirates, the Strait of Hormuz is a narrow passage—only 50 kilometers wide at its entrances and 33 kilometers at its narrowest point. This corridor links the Persian Gulf to the Arabian Sea, accommodating the world’s largest oil tankers. Major producers like Iraq, Kuwait, Qatar, Saudi Arabia, and the UAE rely on it to export their energy resources, alongside global buyers.

According to the U.S. Energy Information Administration, nearly 20 million barrels of oil and refined products traverse the strait daily. This equates to over £447 billion in annual trade, highlighting its economic significance. Additionally, about 20% of global liquefied natural gas (LNG) shipments pass through the region, primarily from Qatar, with the UAE contributing a smaller share.

Disruption and Consequences

When hostilities escalated, the strait became a focal point for geopolitical tensions. Iranian threats to target tankers and ships caused a sharp decline in maritime traffic, with fewer than 3,000 vessels navigating the route monthly. The impact rippled across Asia, where China alone absorbs most of Iran’s exported oil. Shortages led to measures such as remote work mandates, reduced workweeks, and early university closures in multiple countries.

“The risk of attack remains high, and securing insurance is either unattainable or prohibitively costly,” said Arne Lohmann Rasmussen, a senior analyst at Global Risk Management, during the period of instability.

Meanwhile, in Africa, nations like South Sudan and Mauritius implemented electricity rationing to manage fuel scarcity. Europe saw Slovenia become the first EU country to enforce fuel restrictions. The strait also acts as a vital artery for importing goods such as food, medicine, and technology into the Middle East, underscoring its role beyond energy.

Historical Precedents and Military Response

The U.S. has historically intervened to safeguard the strait’s flow. In the late 1980s, during the Iran-Iraq war, attacks on neutral tankers escalated into a “tanker war,” with both sides targeting ships to pressure economies. Today, the U.S. has limited its military actions to air strikes, such as bombing Iranian missile installations along the strait in early March.

Despite calls for international support, President Trump claimed the U.S. could manage the situation independently, dismissing the need for allies or China to station warships in the region. This approach reflects the strait’s dual importance as both a strategic chokepoint and a symbol of broader regional power dynamics.