Super El Niño could hit regions differently, study warns

The anticipated Super El Niño poses a multidimensional threat to the Philippines, worsening structural vulnerabilities in agriculture, energy, and governance. Impacts vary sharply by region due to geography, rainfall dependence, and crop profiles.

Northern and Central Luzon face severe drought and reservoir inflow deficits. Southern Luzon and Bicol experience alternating floods and dry spells. The Visayas face sugarcane and fisheries declines, while Mindanao endures localized drought affecting corn, pineapple, and export crops. These differentiated impacts underscore the need for region-specific adaptation strategies.

Historical analogs (1982-83, 1997-98, 2015-16) show recurring severe droughts and economic shocks. Super El Niño events recur every 10 to 15 years, each inflicting significant agricultural and economic losses, with projected nationwide losses of P286.8 billion (US$5.5 billion) in direct and indirect impacts.

Drawing lessons from Vietnam, Thailand, and Malaysia, pathways to resilience include irrigation modernization, cooperative empowerment, energy diversification, fiscal buffers, and ASEAN-level coordination. Implementing these reforms could reduce projected losses by 60% to 70%, strengthen food security, and raise the Philippine resilience index from 38/100 to 55/100.

Introduction

El Niño–Southern Oscillation (ENSO) is a recurring climatic phenomenon that disrupts global weather patterns. When sea surface temperature anomalies in the central and eastern Pacific exceed 2 degrees Celsius, the event is classified as a Super El Niño, triggering severe drought in Asia and floods in the Americas.

The Philippines, situated at the western Pacific rim, is among the most vulnerable nations due to its monsoon-dependent agriculture, import-reliant energy system, and governance challenges. Forecasts from PAGASA and NOAA indicate a 79% probability of El Niño onset by mid-2026, persisting into early 2027.

Super El Niño could sharply reduce crop yields: rice by 20% to 25%, ube by 30%, and vegetables (no estimate provided). A rice price spike of 40% to 50% may occur.

Mechanisms of Super El Niño formation

Under normal conditions, trade winds push warm water westward, concentrating rainfall in Southeast Asia. During El Niño, these winds weaken, allowing warm water to pool in the central and eastern Pacific.

A Super El Niño intensifies this process, reversing trade winds and amplifying atmospheric convection. The result is a collapse of the southwest monsoon, prolonged drought in Asia and stronger typhoons in the western Pacific. Historical analogs (1982-83, 1997-98, 2015-16) demonstrate that Super El Niño events recur every 10 to 15 years, each inflicting severe agricultural and economic losses.

Regional differentiated impacts in the Philippines

Super El Niño impacts are not uniform across the Philippines. Severity and type of damage vary sharply by region due to geography, rainfall dependence and crop profiles, as shown in Table 1.

Table 1. Regional drought risk

Northern and Central Luzon

Northern and Central Luzon (Regions 1 to 3), encompassing Cagayan Valley, Ilocos, Nueva Ecija, and Pampanga, represent the country’s rice granary, producing nearly half of the national rice output. These regions are highly dependent on the southwest monsoon (Habagat) and large reservoirs such as Magat, Pantabangan, and Angat, which supply irrigation, hydropower, and urban water.

During Super El Niño events, monsoon collapse and inflow deficits of up to 50% severely disrupt water distribution. Historical data from the 1997-98 El Niño showed yield losses of 40% to 60% in Isabela and Nueva Ecija, translating into national rice shortages and price spikes (David, Intal & Balisacan, 2018).

Vulnerability is compounded by reliance on single-season rice cropping, which requires consistent water availability. When reservoirs fail, irrigation cutbacks affect hundreds of thousands of hectares.

As of 2026, the Pantabangan Dam–Upper Pampanga River Integrated Irrigation System (UPRIIS) irrigates about 102,000 hectares of farmland in Nueva Ecija and nearby provinces, making it the largest national irrigation system in the Philippines. During El Niño, prioritization shifts to Metro Manila’s water supply, leaving farmers with insufficient allocations (World Bank, 2025). This competition between agriculture and urban needs magnifies systemic risk.

Adaptation strategies must focus on irrigation modernization, including canal networks modeled after Vietnam’s Mekong Delta, which redistributes water during drought. Solar-powered pumps, rainwater harvesting, and drip irrigation can reduce dependence on monsoon inflows.

Reservoir management must adopt integrated frameworks that balance agriculture, energy and urban water, avoiding zero-sum trade-offs. Crop diversification into drought-resistant varieties such as cassava, sorghum, and adlai, as well as root crops (sweet potato, gabi, cassava), can buffer against rice yield losses. Cooperative seed banks and farmer-managed irrigation associations can enhance resilience by decentralizing water governance.

Southern Luzon and Bicol

Southern Luzon (Calabarzon) and the Bicol Region face erratic rainfall patterns during Super El Niño, alternating between drought and typhoon-induced floods. In 2015-16, Calabarzon recorded water stress in Laguna and Batangas, while Bicol experienced alternating crop failures and flood damage (PAGASA, 2016). Hydropower deficits from Angat exacerbate electricity costs, compounding urban vulnerability in Metro Manila and surrounding provinces.

Drought reduces rice, coconut, and vegetable yields, while typhoons bring episodic rainfall that often results in flooding. This instability undermines agricultural planning and damages infrastructure. For example, Bicol’s abaca industry suffered significant losses in 1997-98 due to alternating drought and typhoon damage, reducing export revenues (FAO, 2019).

Adaptation requires dual contingency planning. Drought-proofing strategies include rainwater harvesting, small-scale irrigation, and crop diversification into root crops and vegetables less sensitive to rainfall variability.

Flood-proofing requires typhoon-resilient infrastructure, including storm-resistant housing, drainage systems, and resilient farm-to-market roads. Investments in early warning systems and community-based disaster preparedness can mitigate alternating extremes.

Visayas

The Visayas, particularly Western Visayas (Iloilo, Negros Occidental), is highly vulnerable due to dependence on sugarcane and rice. During the 1997-98 El Niño, sugarcane yields fell by 25%, destabilizing the ethanol and food industries (FAO, 2019).

Eastern Visayas may still receive rainfall from typhoons, but alternating floods and droughts destabilize production. Fisheries are also at risk, as warmer waters reduce catch volumes by 8% to 12%, undermining coastal livelihoods (FAO, 2019).

Adaptation requires drought-proofing sugarcane and rice through improved irrigation, crop rotation, and stress-tolerant varieties. Cooperative irrigation systems can reduce vulnerability in rainfed areas.

Fisheries adaptation — such as shifting to resilient species, investing in cold storage, and diversifying into aquaculture — can buffer against volatility. Regional contingency planning must integrate agriculture and fisheries, recognizing their interdependence in food security and livelihoods.

Mindanao

Mindanao’s mixed agricultural base makes it vulnerable to both drought and erratic rainfall. Northern Mindanao (Bukidnon, Misamis) is drought-sensitive, with corn and pineapple yields falling by 30% in past El Niño events (World Bank, 2025).

Southern Mindanao (Davao, Cotabato) faces risks to banana and cacao plantations, which generate US$1.6 billion in exports annually. The Zamboanga Peninsula suffers from water shortages and 40% declines in sardine catch, disrupting the canning industry.

Adaptation requires export crop resilience through irrigation scheduling, shade management, and drought-tolerant varieties. Water management must prioritize equitable distribution across agriculture, industry, and households.

Coastal livelihood support — such as alternative income programs, aquaculture diversification, and community-based fisheries management — can mitigate declines in sardine stocks. Strengthening cooperative frameworks and integrating climate risk into export crop planning are essential to protect livelihoods and foreign exchange earnings.

Agricultural and economic losses from Super El Niño events

Super El Niño events in the Philippines (1982-83, 1997-98, and 2015-16) caused severe agricultural and economic losses, ranging from hundreds of thousands of hectares of farmland damaged to billions of pesos in lost production. The 1997-98 episode was the most devastating, while 2015-16 highlighted the persistence of prolonged drought across multiple regions (Table 2).

Table 2. Severe agricultural and economic losses from Super El Niño events

An ex ante financial loss analysis estimating both direct losses (farmers and fisherfolk) and indirect losses (livelihood decline, unemployment) under a severe/Super El Niño event in 2026-27 was done.

Estimated direct losses from crop failures and fishery declines total P77.8 billion, while indirect losses driven by unemployment, disrupted supply chains, and inflationary effects amount to P209 billion (Table 3). Total estimated losses are P286.8 billion (about US$5.5 billion). The combined impact would rival the devastation of the 1997-98 Super El Niño, pushing millions into poverty and destabilizing food security.

Table 3. Projected financial losses (direct and indirect) for the Philippines under severe/Super El Niño, 2026-27

Regional financial losses (Philippines, severe/Super El Niño, 2026-27)

The regional breakdown of direct and indirect financial losses under a severe/Super El Niño (2026-27) scenario is shown in Table 4. The table highlights that Mindanao and Northern/Central Luzon will bear the largest financial damage.

Northern and Central Luzon bear the heaviest agricultural losses due to monsoon collapse and reservoir inflow deficits, threatening the national rice supply. Southern Luzon and Bicol face dual risks — drought and typhoon floods — destabilizing crops and infrastructure. The Visayas face sugarcane and fisheries declines, undermining ethanol and food industries.

Mindanao records the largest combined losses, driven by export crop declines (banana, cacao) and fisheries collapse in Zamboanga. Inflationary effects nationwide amplify poverty incidence, with food prices rising by 10% or more.

Table 4. Regional financial losses (Philippines, severe/Super El Niño, 2026-27)

Pathways to raise Philippine resilience to severe/Super El Niño

The Philippines must learn lessons from Vietnam, Thailand and Malaysia to reduce the projected P286.8 billion (US$5.5 billion) in losses. Adopting these pathways could yield potential savings of P165 billion to P205 billion, reducing projected losses by 60% to 70%.

1. Irrigation modernization and reservoir management (Vietnam model)Vietnam’s Mekong Delta demonstrates resilience through its extensive canal network and adaptive water-sharing systems. During El Niño, Vietnam limited rice yield losses to 10% to 15% by redistributing water efficiently. The Philippines should expand canal systems linked to Pantabangan and Magat dams, integrate solar-powered pumps and adopt rainwater harvesting. Reservoir management must balance agriculture, energy and urban water supply. This would reduce rice yield losses by 10% to 15%, saving P15 billion to P20 billion in direct farmer income.
2. Cooperative empowerment and crop diversification (Thailand model)Thailand’s Chao Phraya Basin integrates reservoir management with farmer cooperatives, enabling coordinated water scheduling and crop diversification. The Philippines must empower cooperatives to manage seed banks, irrigation schedules and crop diversification into root crops such as camote and cassava, as well as sorghum and adlai. This reduces middleman dominance and stabilizes farmer incomes.
3. Energy diversification and drought-proofing (Malaysia model)Malaysia’s plantation economy (oil palm, rubber) is less drought-sensitive, supported by diversified energy sources. Malaysia avoided major electricity price spikes during El Niño by relying on natural gas and renewables. The Philippines must diversify energy sources through solar, wind, and biomass to reduce reliance on hydropower and imported oil. Promoting drought-resistant crops and plantation diversification in vulnerable regions could mitigate electricity price spikes, enabling households to save billions in inflationary losses while stabilizing export crop revenues.
4. Fiscal buffers and social protectionTo protect 1.5 million rural workers from unemployment shocks, cushioning P60 billion to P70 billion in indirect losses, the Philippines should establish a P50 billion to P70 billion contingency fund for agricultural relief, food-price stabilization and livelihood support. Debt restructuring may be necessary to free fiscal space. With debt service rigidity (P18.16 trillion debt, more than 65% of GDP) and peso depreciation (P61-P64/$1), fiscal space for large contingency allocations is limited. This constrains the ability to match Vietnam and Thailand’s scale of relief.
5. ASEAN-level coordinationASEAN neighbors coordinate drought-response protocols, buffer stock systems, and food-price stabilization. Vietnam and Thailand maintain regional rice reserves, while Malaysia invests in water infrastructure. Aligning with ASEAN frameworks for joint procurement of rice and energy, climate risk pooling, and coordinated responses to El Niño-induced yield losses could reduce import dependence, stabilize food prices, and strengthen the resilience index from 38/100 to 55/100.

Conclusion

The Philippines’ vulnerability to Super El Niño reflects monsoon-dependent agriculture, energy import reliance, fiscal rigidity, and governance fragmentation. Projected nationwide losses of P286.8 billion underscore the scale of risk, with Northern and Central Luzon bearing the brunt of drought, Southern Luzon and Bicol destabilized by alternating extremes, the Visayas weakened by sugarcane and fisheries declines, and Mindanao facing export crop and coastal livelihood shocks.

Without systemic reforms, the country risks deepening import dependence, severe inflation, and worsening rural poverty. However, resilience is achievable. By modernizing irrigation systems modeled after Vietnam’s canal networks, empowering cooperatives as in Thailand, diversifying energy sources following Malaysia’s example, establishing fiscal buffers, and engaging in ASEAN-level coordination, the Philippines can cut losses by more than half and stabilize food systems.

Super El Niño is not new to the Philippines, but lessons from past events must now be translated into decisive action. Building resilience is not only a matter of climate adaptation. It is a national imperative for safeguarding livelihoods, food security, and economic stability. /atm

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(Dr. Teodoro C. Mendoza, PhD, is a retired professor and University of the Philippines scientist at the Institute of Crop Science, University of the Philippines Los Baños.)

References

• Asian Development Bank (ADB). (2025). ASEAN Climate Resilience Benchmarking. Retrieved from https://www.adb.org
• David, C. C., Intal, P. S., & Balisacan, A. M. (2018). The Philippine economy and El Niño events. Philippine Institute for Development Studies. Retrieved from https://pids.gov.ph
• Food and Agriculture Organization of the United Nations (FAO). (2025). Food Security and Climate Risks in Southeast Asia. Retrieved from https://www.fao.org
• Food and Agriculture Organization of the United Nations (FAO). (2019). Climate change and fisheries in Southeast Asia. Retrieved from https://www.fao.org
• National Oceanic and Atmospheric Administration (NOAA). (2026). ENSO Diagnostic Discussion. Retrieved from https://www.climate.gov
• Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA). (2026). El Niño Advisory. Retrieved from https://www.pagasa.dost.gov.ph
• Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA). (2016). Climate impact assessment of El Niño. Retrieved from https://www.pagasa.dost.gov.ph
• World Bank. (2025). Philippines Economic Update: Climate and Fiscal Risks. Retrieved from https://www.worldbank.org