Hormuz Attacks and Gulf Storms Push Brent Crude Above $105

Key points

• Brent crude rose 4.8% to $105, while West Texas Intermediate increased to $92.48 per barrel.
• Kpler reported 10 tanker attacks in the Strait of Hormuz between September 28 and October 4, a record weekly high.
• Only seven tankers transited the strait on Tuesday, the lowest count since July 23, 2026.
• Shell and Chevron curtaled production and evacuated staff as Hurricane Isaias approached US refining hubs.
• The IEA stated it would accelerate the release of the remaining 100 million barrels from its 400 million barrel emergency stockpile.

Background

This escalation follows a period of heightened tensions in the Strait of Hormuz that began in August 2026, when Iran and Oman negotiated joint management plans amid rising conflict. Previous archive reports from early October noted that while oil flows had nearly returned to pre-war levels, Iran maintained threats to close transit routes. The current surge in attacks marks a significant deterioration from the brief stabilization seen in late September.

How outlets are covering it

CNN and the Financial Times both highlight the sharp rise in oil prices and the record number of tanker attacks, but they differ in their emphasis on geopolitical drivers. CNN focuses on the immediate supply risks from the attacks and the hurricane, while the Financial Times notes that President Trump’s statement regarding 'productive discussions' with Iran helped pull prices back from their peak. Yahoo Finance emphasizes the combined impact of the storm and attacks on prices, whereas the EIA provides broader context on third-quarter refinery margins, noting that crude prices and margins generally increased throughout the quarter, though it does not detail the specific October 8 events.

Why it matters

The spike in oil prices and the disruption of shipping through the Strait of Hormuz threaten to reignite inflation, particularly in Europe, which relies heavily on imported energy. The simultaneous threat from Hurricane Isaias on US refining capacity compounds the supply risk, potentially leading to higher fuel costs for consumers and increased volatility in global energy markets.

What to watch

Market participants will monitor the pace of the IEA's emergency oil releases and the impact of Hurricane Isaias on US Gulf Coast production. Additionally, the outcome of US-Iran discussions and any further escalation in tanker attacks will determine whether oil prices stabilize or continue to rise in the coming weeks.