Iran parliament votes to block Strait of Hormuz amid US strike fallout

Iran’s Islamic Consultative Assembly (parliament) approved a resolution on June 22 backing the potential closure of the Strait of Hormuz, a crucial maritime route through which roughly 20% of global oil and Liquefied Natural Gas (LNG) flows.

The measure comes in response to recent US airstrikes on Iranian nuclear facilities, although final approval lies with Iran’s Supreme National Security Council and Supreme Leader Ayatollah Khamenei.

Blocking or disrupting the narrow waterway—a mere 31 miles (50 km) wide, with just two-mile-wide shipping lanes—could massively impact international oil and gas trade.

Experts warn Iran could employ asymmetric tactics such as naval mines, anti-ship missiles, drone swarms, or cyber threats.

Markets reacted swiftly: Brent crude temporarily surged past $100/barrel, with analysts warning of prices reaching $150–200/barrel in case of a protracted closure.

US Deputy Secretary of State Marco Rubio warned that such a move would amount to “economic suicide” for Iran and urged major oil consumers like China to intervene.

Potential global effects:

Disruptions could remove 20 million barrels/day of crude and significant LNG volumes from global supply.

India, which imports over 85% of its crude by sea—much via Hormuz—could see severe price spikes and inflationary pressure.

Replacement pipelines from Saudi Arabia and UAE offer limited capacity (~7–8 mbd) and would come at higher transit costs.

Despite intensified threats, analysts caution that a full mechanical blockade is unlikely, as it would harm Iran’s own energy exports and economy. The move appears aimed more at strategic signalling than actual shutdown.

With the US Fifth Fleet and allied forces already deployed to ensure freedom of navigation, any attempt at closure would mark a serious escalation.

For now, the resolution highlights rising Middle East tensions, underlining the vulnerability of global energy markets to geopolitical shifts.