Southeast Asia's Energy Lifeline Under Threat: ASEAN Summit Faces Its Toughest Test

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A Summit Shaped by a War Far Away

The leaders of Southeast Asia have gathered on the Philippine island of Cebu this week, but their eyes are fixed firmly on the Persian Gulf. The 48th Summit of the Association of Southeast Asian Nations (ASEAN) — a bloc of eleven countries home to nearly 700 million people — opened on Thursday under the shadow of an energy crisis with no easy exit in sight.

The trigger: the war launched by the United States and Israel against Iran on February 28, 2026, which effectively shut down the Strait of Hormuz — one of the most critical shipping lanes on the planet. Before the conflict, up to 84% of crude oil and 83% of liquefied natural gas (LNG) destined for Asia passed through that narrow waterway. The closure has sent fuel prices surging across the region and raised urgent questions about food security as well.

Philippine President Ferdinand Marcos Jr., whose country chairs ASEAN in 2026, has described this as a "bare-bones" summit — stripped of its usual broad agenda to focus almost exclusively on the crisis at hand.

The Strait That Feeds a Region

The Strait of Hormuz, a narrow passage between Iran and the Arabian Peninsula, is not just an oil route. Resources like Liquefied Natural Gas, sulfur, and ammonia are also shipped through the Strait — all of them directly linked to agriculture and food security in Southeast Asia. The ripple effects are already being felt at supermarkets and petrol stations across the region.

The US Energy Information Administration has noted the depth of Asia's dependency on the Gulf, while the India-based Observer Research Foundation, in a late April 2026 analysis, concluded that "the crisis underscores the structural vulnerability of Southeast Asia's energy dependence on distant and volatile supply regions."

The Philippines itself has declared a national energy emergency, and Vietnam and Indonesia are also grappling with rising inflation and supply shortages. Countries in the region resent paying the economic price for what many see as U.S. foreign-policy decisions made thousands of miles away.

Can ASEAN Actually Agree on Anything?

The summit is not just about diagnosing the problem — it's about whether Southeast Asia's most important regional body can move from words to action.

Analysts say the crisis is exposing deeper questions about ASEAN's ability to respond collectively to external shocks. The bloc, with a combined GDP of roughly $3.8 trillion, has a well-documented tendency to produce joint statements rather than binding agreements. This time, however, the pressure may be different.

Philippine Foreign Secretary Ma. Theresa Lazaro put it plainly: "ASEAN needs to strengthen our crisis coordination and institutional readiness in times of crisis." Economic ministers on Thursday proposed diversifying supply sources and routes, and pledged to intensify coordination — though specific commitments, particularly around a long-discussed regional oil-sharing framework, remain elusive.

Georgi Engelbrecht, senior analyst for the Philippines at the International Crisis Group, told Anadolu Agency: "Everyone is concerned by the crisis. The question is if ASEAN is able to play a collective role."

According to a draft of the summit's closing statement seen by journalists, ASEAN leaders plan to call for good-faith negotiations between the United States and Iran, an end to hostilities, and for international law to be upheld and traffic to flow unimpeded through the vital Strait of Hormuz. The draft also urges early ratification of a regional fuel-sharing pact.

Thailand and Cambodia: A Fragile Peace on the Sidelines

Beyond the energy crisis, ASEAN's own internal tensions have not gone away. One of the most delicate is the simmering border conflict between Thailand and Cambodia, which flared twice in 2024 — in July and again in December — with artillery exchanges, air strikes, and significant casualties on both sides.

A fragile ceasefire has held since late December, but troops remain deployed along the 817-kilometer border. President Marcos arranged a rare three-way meeting in Cebu on Thursday between himself and the prime ministers of both countries — a diplomatic gesture aimed at keeping regional tensions from derailing the summit atmosphere.

During the first round of fighting, U.S. President Donald Trump intervened to help broker a halt — a move that was widely noted in diplomatic circles. His subsequent attempt to stop the December escalation did not succeed, and the two sides ultimately negotiated a bilateral truce on their own. Thailand has signaled that Thursday's meeting was about rebuilding trust, not reaching any formal agreement.

Myanmar: Still in the Cold, Knocking on the Door

The Myanmar issue remains one of ASEAN's most painful unresolved problems. The country's military junta has been barred from ASEAN summits since it seized power in a 2021 coup, triggering a brutal civil war.

In recent weeks, junta leader Min Aung Hlaing — now installed as president following widely criticized elections — has signaled a desire to return to the ASEAN fold. Myanmar has also released several political prisoners and transferred ousted civilian leader Aung San Suu Kyi from prison to house arrest, moves described by observers as gestures toward diplomatic re-engagement.

Min Aung Hlaing has said his government would "work to restore normal relations" with ASEAN, but the bloc appears far from a consensus on the matter. The Philippines has called on ASEAN's special envoy to be granted access to Suu Kyi as a test of Myanmar's "genuine commitment to national reconciliation."

Looking Ahead

The main ASEAN leaders' summit takes place on Friday. Expectations for sweeping breakthroughs remain modest. Engelbrecht noted that a joint statement is far more likely than major policy breakthroughs — though he added, "it is not impossible."

What is clear is that the energy crisis has concentrated minds in a way that few previous ASEAN challenges have managed to do. As one local expert put it, there needs to be "a bigger emphasis on regional economic integration of energy sources so that the region as a whole is not vulnerable to the volatilities of a fuel crisis." Whether ASEAN's notoriously consensus-driven structure can deliver on that ambition — and quickly — remains the defining question of this summit.

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Sources:

1. Reuters – "Energy crisis front and centre as ASEAN leaders prepare for summit": https://www.reuters.com/world/china/energy-crisis-front-centre-asean-leaders-prepare-summit-2026-05-06/
2. Rappler – "ASEAN in Cebu: What you need to know": https://www.rappler.com/philippines/things-to-know-asean-cebu-may-2026/
3. The Jakarta Post / AFP – "Southeast Asian nations start summit, aiming to tackle energy crisis": https://www.thejakartapost.com/world/2026/05/07/southeast-asian-nations-start-summit-aiming-to-tackle-energy-crisis.html
4. Anadolu Agency – "Summit under strain: Energy crisis puts ASEAN to the test": https://www.aa.com.tr/en/asia-pacific/explainer-summit-under-strain-energy-crisis-puts-asean-to-the-test/3929058
5. Foreign Policy – "ASEAN Leaders Summit in Philippines Focuses on Fuel Crisis": https://foreignpolicy.com/2026/05/06/asean-cebu-leaders-summit-philippines-fuel-crisis/

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