Double Lock, Take Two: How 2026-27 Differs From the 1997-98 El Niño — And Why a Middle East War Changes Everything

Malaysians old enough to remember 1997-98 will recall a year that felt like it came at the country from every direction at once. The skies turned brown with haze from Indonesian peat fires. Selangor households queued for water during scheduled rationing. And underneath it all, the ringgit was in freefall as the Asian Financial Crisis tore through regional economies. Climatologically, that year was driven by one of the strongest El Niño events on record, paired with a positive Indian Ocean Dipole (pIOD) — a combination now sometimes called a “Double Lock,” because both ocean basins are pushing in the same direction: less rain, more heat, more fire risk for the Maritime Continent.

Nearly three decades later, forecasters are watching a strikingly similar Double Lock take shape. NOAA’s most recent outlook points to El Niño conditions developing rapidly through mid-2026, with some models suggesting the Oceanic Niño Index could approach levels not seen since the 1997-98 event — potentially the strongest in nearly 150 years of record-keeping. A positive IOD is forecast to develop alongside it later in the year, recreating the same dry-and-hot setup that hit Southeast Asia so hard last time.

But 2026-27 is not simply a rerun of 1997-98. The economic shock accompanying this cycle isn’t a regional currency crisis — it’s a war in the Middle East. And that difference changes the shape of the impact on Malaysia in ways worth unpacking sector by sector.

The Climate Picture: Familiar Mechanics, Same Risks

The physics of a Double Lock event don’t change. During El Niño, trade winds weaken across the Pacific, while in the Indian Ocean, the same broad atmospheric shift cools the eastern basin near Sumatra and Java relative to the west — the signature of a positive IOD. For Malaysia and its neighbours, the combined effect is a sharp reduction in the convective rainfall that normally keeps the region green and humid.

In 1997-98, this translated into one of the most severe droughts in modern Malaysian history. Reservoirs serving the Klang Valley fell to critical levels, triggering water rationing across Kuala Lumpur and Selangor that lasted months. Padi yields fell, oil palm fresh fruit bunch production dropped as trees came under moisture stress, and the dried-out peatlands and forests of Sumatra and Kalimantan ignited on a scale that produced the infamous 1997 haze crisis — bad enough that Sarawak declared a state of emergency.

The current forecasts suggest Southeast Asia should brace for a similar pattern. NOAA’s latest update gives an 82% chance of El Niño developing between May and July 2026, with early projections suggesting the event could become strong or very strong by year’s end and persist into early 2027. By early June 2026, NOAA’s National Weather Service had already declared that El Niño had developed in the tropical Pacific and issued an advisory, forecasting intensification to moderate or strong levels by autumn. On the Indian Ocean side, dynamic models project a moderate-to-strong positive IOD developing in parallel with El Niño through the second quarter of 2026 — and analysts specifically flag that the 1997-98 and 2023-24 El Niño/pIOD combinations were both associated with dry conditions.

If this plays out as forecast, Malaysia should expect the same broad menu of climate impacts as 1997-98: drought stress on agriculture, falling reservoir levels, elevated fire and haze risk from regional peatland burning, and strain on hydropower generation in Sabah. The mechanics are not new. What’s new is everything happening around them.

The Economic Backdrop: From a Regional Currency Crisis to a Global Energy Shock

This is where 2026-27 sharply diverges from 1997-98 — and where the “compounding” risk becomes far more direct and immediate.

In 1997-98, the shock arrived through financial markets. Currency speculation, capital flight, and collapsing asset prices hammered Malaysia’s financial sector and consumer spending power. The climate disaster and the financial crisis were, for the most part, parallel tracks that happened to overlap in time — the haze didn’t cause the ringgit to collapse, and the currency crisis didn’t cause the drought. They simply both happened, and Malaysians absorbed both blows at once.

The 2026 shock is structurally different because it runs through the same channel that climate impacts also affect: energy.

Since 28 February 2026, the United States and Israel have been engaged in a war with Iran and its regional allies, beginning with airstrikes on Iranian military, government, and nuclear-related sites. In retaliation, Iran launched missile and drone strikes targeting US installations and oil infrastructure across the region, including vessels in the Strait of Hormuz, in an attempt to pressure its adversaries toward mediation — disrupting global travel and trade and forcing shipping reroutes away from the Strait of Hormuz and the Red Sea.

For Malaysia, the Strait of Hormuz closure is not an abstract geopolitical headline — it goes straight to the pump. Tehran’s response to the conflict was to close the Strait of Hormuz, the channel through which roughly 20% of the world’s oil and gas normally flows, and oil prices that had been sitting around USD65 a barrel surged past USD100 within days — a jump of more than 40%. Prime Minister Anwar Ibrahim explained that despite being an oil producer, Malaysia actually imports more crude than it exports, and approximately 50% of the country’s oil supply normally passes through the now-volatile Strait of Hormuz.

The fiscal consequences arrived almost immediately. The government’s monthly fuel subsidy bill — needed to keep RON95 capped at RM1.99 a litre — ballooned from RM700 million to roughly RM4 billion a month, nearly six times the January figure, even as Budget 2026 had been drawn up assuming oil at USD65 a barrel. Analysis by The Edge Malaysia found that at USD100 a barrel, the government gains an additional RM10.5 billion in oil and gas revenue, but the fuel subsidy burden reaches roughly RM19.8 billion — nearly double that additional revenue.

Put simply: in 1997-98, the financial crisis and the climate crisis were two separate storms that happened to coincide. In 2026-27, the war and the climate crisis are converging on the exact same vulnerability — energy and food security — at the exact same time. That’s a fundamentally tighter feedback loop.

Sector-by-Sector: Where the Two Crises Now Overlap

Water and energy. In 1997-98, drought-driven reservoir depletion was largely a standalone hydrological problem, with knock-on effects for Sabah’s hydropower. In 2026-27, any drought-driven strain on hydropower arrives while the broader energy system is already under acute pressure from oil and gas supply disruptions. A dry-season hit to hydroelectric output in Sabah no longer happens in isolation — it lands on a grid and a national budget already absorbing the cost of a global energy shock.

Logistics and transport. The 1997-98 haze grounded flights and disrupted shipping schedules largely because of visibility and air quality. The 2026-27 disruption to logistics is compounding on two fronts simultaneously: Pos Malaysia imposed fuel surcharges of between 15% and 40% since mid-March 2026, with weekly revisions, while Malaysia Airlines, Firefly, and Batik Air introduced similar surcharges, and global maritime traffic disruption has forced Malaysian exporters across multiple industries to reroute shipments and absorb delays. If haze-related flight disruptions return later in 2026 as forecast drought conditions intensify, they would stack on top of an aviation sector already managing war-driven fuel surcharges and rerouted airspace.

Food security and agriculture. The 1997-98 drought reduced padi yields and forced increased rice imports, a problem that was serious but containable within a relatively stable cost environment. In 2026-27, any drought-related drop in domestic food production runs into a food system where input costs — fertiliser, fuel for irrigation pumps, transport to market — are already elevated by the energy shock. Commentary on the 2026 crisis has noted that its effects “seep into every aspect of life — from vegetable prices at the market, Grab rides to work, to the cost of flight”(paraphrased), underscoring how a single energy shock cascades through the entire cost-of-living structure before a drought even adds its own pressure on yields.

Fiscal policy and subsidy reform. Perhaps the starkest difference is in the government’s room to manoeuvre. In 1997-98, fiscal policy was largely reactive to the currency crisis — capital controls, bank recapitalisation, and austerity dominated the response. In 2026, Malaysia entered the year mid-way through a politically sensitive subsidy rationalisation programme, and the war has scrambled the calculus entirely. Malaysia has kept fuel prices subsidised while introducing purchase caps from 1 April 2026, temporarily reducing the RON95 purchase limit from 300 litres to 200 litres per month, as part of a broader Southeast Asian pattern of governments straining their budgets to contain retail fuel prices. If a severe drought now arrives on top of this — increasing demand for diesel-powered irrigation and water transport precisely when diesel is most expensive and most tightly rationed — the subsidy system faces pressure from both the energy crisis and the climate crisis at once, with no clean way to separate the two policy responses.

Cross-border smuggling and enforcement. The widening gap between subsidised fuel prices in East Malaysia and market prices in neighbouring countries has already prompted the formation of a special enforcement committee, chaired by the Second Deputy Prime Minister, to monitor and curb fuel smuggling across the Sabah and Sarawak borders. A drought-driven spike in diesel demand for water pumping and generator use in rural and plantation areas would add further pressure to a smuggling and enforcement problem that didn’t exist in anything like this form in 1997-98.

What’s the Same, and What Isn’t

It’s worth being precise about what has and hasn’t changed. The underlying climate drivers — El Niño and positive IOD acting together to suppress rainfall across the Maritime Continent — appear to be following a strikingly similar script to 1997-98, and the headline risks (drought, haze, water stress, hydropower strain) are likely to look familiar to anyone who lived through that year.

What’s different is the economic environment those climate risks are landing in. 1997-98 paired a severe climate shock with a severe but largely separate financial shock. 2026-27 pairs a potentially comparable climate shock with a war-driven energy shock that operates through precisely the same channels — fuel costs, food costs, logistics costs — that a drought would also stress. Rather than two storms passing through at the same time, this looks more like one storm system feeding directly into another.

For households and businesses, the practical upshot is that the margin for absorbing a bad drought year is thinner than it was in 1997-98, because the buffer — cheap energy, manageable subsidy bills, stable logistics costs — has already been spent absorbing the war’s impact before the worst of the climate season even arrives. Whether the second half of 2026 brings the same Double Lock severity as 1997-98 remains to be seen, but the conditions for a compounding crisis — climatic and geopolitical pressures converging on the same vulnerabilities — are already more tightly linked than they were the last time Malaysia faced a Double Lock event of this magnitude.

This piece is a sensitive-topic synthesis of current climate forecasts and ongoing geopolitical developments; both the El Niño/IOD outlook and the Middle East conflict situation remain fluid and subject to change as new data and news emerge.

Latest update: Iran and US is planning to sign the ceasefire agreement on 19 June 2026. Hope the agreement is realized and the worldwide supply chain is restored soon.

Source: Claude A.I.