U.S.–Iran threats escalate over Hormuz Strait

Supply-chain Risk Briefing

Summary

Tensions escalated between the US and Iran in Tehran on April 18, 2026, creating a threat situation. While President Trump threatened to strike Iranian power facilities to lift the Strait of Hormuz blockade, both sides agreed to a 2-week ceasefire, though Iran warned of retaliatory strikes on desalination facilities. The current crisis level is assessed as critical.

Supply-chain impact

• Strait of Hormuz blockade risk: Critical maritime corridor through which approximately 20% of global crude oil shipments pass faces potential complete energy supply chain paralysis if blocked
• Natural gas supply disruption: Iran holds the world's second-largest natural gas reserves, and disruption of regional gas pipelines and LNG export routes could trigger price surges in Asian-European energy markets
• Middle East power grid instability: Strikes on Iranian power facilities could create cascading effects on interconnected power grids with neighboring countries
• Desalination facility threats: Attacks on Gulf region freshwater supply chains could cause industrial water shortages, disrupting petrochemical and manufacturing production
• Regional logistics network paralysis: Suspension of Persian Gulf port operations expected to severely delay container and raw material transportation

Watch points

• Negotiation progress within 2-week ceasefire period: Need to track Strait of Hormuz reopening negotiation results and whether either side takes additional measures
• Crude oil and gas spot price and futures market volatility: Monitor potential global inflation pressure expansion if Brent crude, WTI, and Henry Hub gas prices surge
• Alternative transportation route availability: Monitor freight rate increases and transportation capacity limits for Suez-Mediterranean routes and Africa bypass shipping lanes