Brent crude breaks $100 a barrel as Houthi attacks strike Saudi oil facilities and Iran threatens US energy assets in the Gulf

Energy & Tech

Brent crude breaks $100 a barrel as Houthi attacks strike Saudi oil facilities and Iran threatens US energy assets in the Gulf

Brent crude rose above $100 a barrel on 9 September 2026 for the first time since July, extending a four-session run of gains as the Middle East conflict broadened materially. On Tuesday 8 September, Iranian-backed Houthi forces launched a wave of attacks on Saudi Arabia, striking oil facilities and civilian infrastructure in the cities of Abha, Jazan, Najran and Khamis Mushait. Saudi authorities confirmed 73 people were wounded. Fires broke out at several oil facilities and utilities in the kingdom's southern region, temporarily suspending operations including at a 400,000-barrel-per-day oil refinery in Jazan. Aramco facilities in Najran and Abha were also targeted, as was King Khalid Air Base. Separately, Iran's Parliament Speaker Mohammad Bagher Ghalibaf warned on 8 September that US oil and gas interests across Gulf waters and facilities share exposure to Iranian strikes, characterising the Persian Gulf and Gulf of Oman supply chain as "sprawling, accessible, and exposed." Iran's Supreme National Security Council Secretary announced new strategies including a planned exclusion zone through the Strait of Hormuz and into the Persian Gulf, under which vessels entering to transit the Strait would be placed on an Iranian sanctions list. The US and Iran have exchanged strikes for the past week following the expiry on 17 August of a 60-day Memorandum of Understanding signed on 17 June. Commercial traffic through the Strait of Hormuz, through which roughly a fifth of global oil and LNG (liquefied natural gas) shipments previously flowed, has fallen sharply. The is widely expected to remain on hold at its next meeting, but indicated on Tuesday that inflation risks are to the upside, adding to sterling market volatility. The (European Central Bank) is widely expected to raise rates by a quarter of a percentage point on Thursday.

Why this matters

Brent crossing $100 per barrel is a threshold with direct legal and contractual consequences across energy markets. Long-term supply agreements, hedging arrangements, and project finance facilities frequently contain price-linked covenants, break-even tests, or force majeure clauses tied to market disruption, and a sustained triple-digit oil price reshapes compliance obligations across all of them. The threatened Iranian exclusion zone around the Strait of Hormuz, if implemented, would constitute a novel unilateral maritime restriction with no clear precedent under the UN Convention on the Law of the Sea and would immediately engage international shipping law, war risk insurance underwriting, and sovereign sanctions compliance frameworks. For London-based energy lawyers and structured finance teams, the combination of Houthi attacks on Saudi infrastructure and a potential Hormuz exclusion zone creates a cluster of simultaneous force majeure and sanctions-screening issues.

On the Ground

The escalation generates work across energy law, international arbitration, insurance, banking and structured finance, and sanctions compliance. Energy traders and their banks will need immediate advice on whether oil price movements and route disruption trigger force majeure or material adverse change provisions in long-term supply and offtake agreements. War risk and political risk insurance teams will face a wave of coverage queries as Houthi attacks on Saudi facilities and tankers in the Red Sea extend beyond previous attack patterns. Structured finance and project finance lawyers acting for lenders to Gulf energy assets will need to review facility conditions and MAC (material adverse change) definitions. No specific law firms are named in the sources. A trainee would assist by reviewing and summarising force majeure clauses across a client's contract portfolio, preparing sanctions screening memos on new Iranian designation lists, and coordinating with local counsel on jurisdictional impact assessments.

Brent crude breaks $100 a barrel as Houthi attacks strike Saudi oil facilities and Iran threatens US energy assets in the Gulf | Folio