The Middle East war has removed an estimated 260,000 barrels per day from Southeast Asian oil demand, the International Energy Agency said in its October Oil Market Report. The 3.7 percent year-on-year decline during March-August 2026 marks a six percentage point swing from the 2.3 percent growth the IEA had expected before fighting began.

How exposed is the region?

Southeast Asia, Africa and South America together account for 17.8 million barrels per day of consumption in 2025. The three regions now follow sharply divergent paths.

Southeast Asia appears most exposed. Its trade routes thread through the Strait of Hormuz. Apparent demand fell by a steeper 6.3 percent, suggesting heavy inventory draws that headline numbers do not capture.

Southeast Asian economies including Indonesia, Vietnam, Malaysia, the Philippines and Thailand had each been pencilled in for steady consumption gains before the war began to weigh on regional trade flows and freight insurance premiums.

The IEA forecasts Southeast Asian demand to decline by 160,000 barrels per day in 2026, equivalent to roughly the daily output of a small North Sea field. A rebound of 270,000 barrels per day is projected for 2027.

The verdict: dependence on Hormuz traffic is now a line item on every emerging-market trader's spreadsheet.

Why has Africa reversed so sharply?

Africa's prewar growth of 3.4 percent has turned negative. Regional consumption contracted 2.5 percent year-on-year during March-August 2026. Apparent demand fell by about 6 percent.

The continent relies on imported diesel and gasoline. That dependency has deepened its exposure to supply shocks and freight spikes across both the Red Sea and the Mediterranean, leaving very few domestic substitutes available at scale.

• Nigerian demand fell 150,000 barrels per day, or nearly 30 percent, in July year-on-year
• Full-year 2026 consumption is projected at 470,000 barrels per day, down 60,000 barrels per day
• Egyptian demand dropped 110,000 barrels per day, or 12.3 percent, in the second quarter

Egypt, the continent's largest oil consumer, will see full-year demand fall by 130,000 barrels per day in 2026. Recovery in 2027 will add only 40,000 barrels per day, the IEA said.

Nigerian trade has tilted toward product exports, including middle distillate shipments. Africa cannot return to growth until those fuel imports normalize and domestic refining throughput recovers from a multi-quarter slump.

Why has South America held up?

South American demand rose 1.9 percent year-on-year during March-August 2026. That figure edges above the 1.7 percent growth recorded in the prior six months.

Brazil carried the regional gain. Brazilian consumption climbed 110,000 barrels per day, or 3.2 percent year-on-year, in August. The IEA expects Brazilian demand to grow by 60,000 barrels per day in 2026, with another 40,000 barrels per day added in 2027.

Brazil's domestic refining expansion, combined with its relatively limited exposure to Middle Eastern crude grades, has positioned the country as the regional standout during the current demand shock.

Most South American crude and product imports originate in the Atlantic Basin. The geography has shielded the region from the worst of the disruption.

What is the watch item?

The IEA's 2027 recovery forecasts assume the Middle East disruption eases and emerging-market fuel imports stabilize. November and December monthly reports will test that assumption against realized data, the actual flow of Middle Eastern crude, and freight rates through regional chokepoints.

The bottom line: the next Strait of Hormuz cargo queue will tell traders whether the rebound is real or merely pencilled.