Prepare for Impact: El Niño Is Arriving on the World's Doorstep With 90% Certainty
Something momentous is happening beneath the surface of the Pacific Ocean, and the world's foremost climate scientists want you to know about it now, before the consequences become unavoidable. On June 2, 2026, the World Meteorological Organization issued a landmark bulletin from its Geneva headquarters warning that El Niño conditions are actively developing and are set to reshape global temperature and rainfall patterns for the foreseeable future. The agency placed the probability of an El Niño event during the June to August window at 80%, rising to near or above 90% through November. These are not hedged probabilistic guesses. They represent the highest degree of scientific consensus the WMO has ever attached to an El Niño forecast at this stage of the year.
The trigger for such urgency lies in what is happening deep beneath the ocean's surface. In late April through mid-May 2026, sea surface temperatures in the central-eastern equatorial Pacific, the monitoring reference zone known as the Niño 3.4 region, were already approaching established El Niño thresholds. Crucially, that warming is being fed by something far more alarming: subsurface ocean temperatures across the tropical Pacific are running more than 6°C above average, forming an enormous reservoir of heat that will take months to dissipate regardless of atmospheric conditions. This subsurface heat pulse is widely regarded as one of the most robust early indicators that a significant event is on the way.
"Fueled by unusually warm ocean waters in the tropical Pacific, El Niño conditions are developing and are set to influence global temperature and rainfall patterns, increasing the risk of extreme weather over the coming months." — WMO press release, June 2, 2026
"We need to prepare for a potentially strong El Niño event — which will exacerbate drought and heavy rainfall and increase the risk of heatwaves both on land and in the ocean. The most recent El Niño, in 2023–24, was one of the five strongest on record and it played a role in the record global temperatures we saw in 2024." — WMO Secretary-General Celeste Saulo
The atmospheric arm of the system, measured through what scientists call the Southern Oscillation Index, is also now consistent with developing El Niño conditions, meaning both the oceanic and atmospheric components of the El Niño–Southern Oscillation (ENSO) cycle are aligning simultaneously. In April, the WMO's chief of climate prediction, Wilfran Moufouma Okia, said that climate models were "strongly aligned" and that confidence in the onset of El Niño was now high, "followed by further intensification in the months that follow." That language, coming from the body that coordinates global meteorological science, left little room for doubt.
What El Niño Actually Does to the Planet
El Niño is a naturally occurring climate phenomenon that begins when consistent trade winds, which normally push warm water westward across the tropical Pacific, weaken or reverse. Warm water piles up instead in the central and eastern Pacific, off the coasts of South America. That shift releases enormous quantities of heat into the overlying atmosphere, temporarily driving up global average temperatures and disrupting weather patterns that billions of people depend on across every continent.
A typical El Niño event tends to cause a temporary increase in global mean temperature in the order of 0.1°C to 0.2°C above the already rising baseline, according to Nat Johnson, a meteorologist at the US National Oceanic and Atmospheric Administration. That might sound small, but on top of a planet that is already running 1.55°C above pre-industrial levels, as it was in 2024, even modest additional warming can tip weather systems toward extremes that would not otherwise occur. The last El Niño event, which ran through 2023 and 2024, was ranked among the five strongest ever recorded and played a decisive role in 2023 becoming the second-hottest year in history and 2024 the absolute warmest ever measured.
The regional effects of a strong El Niño are varied and devastating. Prolonged drought descends on Southeast Asia, Australia, southern Africa, and parts of the Indian subcontinent, decimating crops and shrinking water reserves. Meanwhile, catastrophic rainfall batters the southern United States, coastal Peru, the Horn of Africa, and equatorial East Africa, triggering floods and landslides. Coral reefs bleach en masse as ocean temperatures spike. Hurricane seasons in the Atlantic tend to become less active, but those in the central Pacific intensify dramatically. The Amazon, already weakened by decades of deforestation, faces deepening drought. And wildfire seasons across multiple continents stretch longer and burn hotter.
"El Niño conditions will pour fuel on the fire of a warming world. Impacts will hit even harder, travel even farther, and cross borders with devastating speed."— UN Secretary-General António Guterres, video statement, June 2026
What makes the 2026 event so alarming to scientists is not that it is happening, because El Niño recurs every two to seven years. It is that it is arriving into a world already far warmer than at any point in the history of modern civilization, stacked atop human-induced greenhouse gas warming that has no seasonal pause. As the WMO underlined in its June bulletin, naturally occurring climate events like El Niño and La Niña now take place against a backdrop of anthropogenic climate change that is "increasing global temperatures in the long-term, exacerbating extreme weather and climate events, and impacting seasonal rainfall and temperature patterns." The two forces do not simply add together. They interact and amplify each other in ways that are still being fully understood.
The Temperature Record Is Already in Danger
The WMO's annual Global Annual-to-Decadal Update, produced in partnership with the UK Met Office and synthesizing forecasts from 13 independent climate modeling institutes, has placed an 86% probability on at least one year between 2026 and 2030 surpassing 2024 as the single hottest year in recorded history. That figure has risen from 80% in the previous year's forecast, a significant jump that reflects both the expected return of El Niño and the relentless upward march of background warming from fossil fuel emissions.
The report's lead author, Leon Hermanson of the UK Met Office, was unusually direct. "There is an El Niño predicted for the end of 2026," he said, "which increases the chances of the following year, 2027, being the next record-breaking year." Climate scientists James Hansen and colleagues, writing independently in December 2025, project global temperature could hit +1.7°C above the 1880 to 1920 baseline in 2027, which would represent an acceleration of warming beyond anything previously observed in the instrumental record. Meanwhile, the WMO's five-year outlook assigns a 75% probability that the 2026 to 2030 mean will exceed 1.5°C above pre-industrial levels, the threshold enshrined as the more ambitious target of the Paris Agreement.
Carlo Buontempo, director of the European Union's Copernicus Climate Change Service, has suggested that 2026 itself could challenge existing heat records depending on exactly when the El Niño peaks and how strong it becomes. However, most models point to 2027 as the more likely year for a new record, since El Niño's strongest atmospheric influence typically lags its oceanic peak by six to twelve months. The US National Oceanic and Atmospheric Administration currently places roughly a one-in-three chance on a strong event forming during the October to December window this year, with European models suggesting even higher probabilities of a very strong or potentially "super" El Niño.
Food Systems on the Brink
Perhaps the most visceral consequence of a strong El Niño is the disruption it inflicts on global food production. The effects ripple through agriculture in multiple directions simultaneously. Drought in major rice-growing regions of South and Southeast Asia slashes yields. Prolonged dry spells wither maize and wheat harvests across southern Africa. Flood damage destroys crops in parts of Latin America that would otherwise benefit from the rain. And a warming ocean disrupts marine fisheries that hundreds of millions of coastal people depend on for protein.
The scale of the threat is already being felt. The World Bank's Commodity Markets Outlook warns that rice output in the affected regions could fall by 20 to 50% if a strong El Niño materializes through 2027. Fertilizer prices are projected to rise by an average of 31% in 2026, reaching their least affordable levels since 2022, while cereal price indices have already climbed 4% since March and maize and wheat have closed 5% and 11% higher respectively. In the Philippines alone, the national agriculture department is projecting that rice production could drop by as much as 700,000 metric tons, or 3.5% of the annual target. The country's meteorological agency has placed a 92% probability on a moderate to strong El Niño striking in the fourth quarter of 2026 and potentially extending into 2027.
"A 61 to 87 percent probability of El Niño emerging by mid-2026 and continuing into 2027 could make the situation worse by threatening crop production in South Asia, Southern Africa, and parts of East Asia, with rice output potentially falling by 20 to 50 percent." — World Bank Commodity Markets Outlook, June 2026
The damage from the 2023 to 2024 El Niño offers a sobering preview of what is coming. In the Philippines that event inflicted P57.78 billion in agricultural losses, the largest in recent history. Corn, essential for livestock feed, suffered most severely, followed by rice, high-value crops, cassava, coconut, and fisheries. Overall agricultural output across the country fell 2.2% in 2024. Similar patterns played out across Indonesia, Thailand, Vietnam, and sub-Saharan Africa, where the compounding of El Niño drought with pre-existing conflict and economic vulnerability left millions facing acute food insecurity. The World Food Programme has already begun modeling the compounding effects of the incoming 2026 event on nations still recovering from the last one.
An additional complicating factor this cycle is the geopolitical disruption to global fertilizer supply chains, particularly potash and nitrogen products affected by the conflict in the Middle East. Climate scientists at CNBC have noted that a powerful El Niño arriving simultaneously with fertilizer supply strain could put compounding upward pressure on cocoa, food oils, rice, and sugar markets in ways that hit the world's most vulnerable populations hardest. Food insecurity is not an abstract concern. It is the most immediate and deadly downstream consequence of what happens in the equatorial Pacific.
The Long Shadow on Human Health and Life Expectancy
El Niño does not just threaten harvests. Its effects cut deeply into human health and even longevity in ways that researchers are only now beginning to fully quantify. A landmark study published in Nature Climate Change in January 2026 calculated that the 1982 to 1983 El Niño event caused life expectancy losses of 0.5 years across high-income Pacific Rim countries, with a monetary equivalent loss of US$2.6 trillion. The 1997 to 1998 Super El Niño reduced life expectancy by 0.4 years, but with a monetary equivalent loss of US$4.7 trillion, reflecting a wealthier baseline economy absorbing greater absolute damage. These figures apply only to high-income nations; the losses in lower-income countries, where health systems are less resilient, are likely to be significantly greater and far less studied.
The mechanisms run through multiple pathways. Drought and food shortage trigger malnutrition, particularly devastating for children under five, whose cognitive and physical development suffers irreversible harm during prolonged food stress. Flooding spreads waterborne diseases, including cholera, typhoid, and hepatitis A. Warmer ocean temperatures drive harmful algal blooms that contaminate shellfish harvests and poison coastal communities. Heatwaves associated with El Niño peaks increase cardiovascular and respiratory mortality, particularly among the elderly. In vector-borne disease epidemiology, El Niño has been linked to expanded ranges for malaria-carrying mosquitoes and to surges in dengue fever incidence across South and Southeast Asia, a pattern researchers expect to intensify as baseline temperatures rise.
A Planet Already Weakened
The scientists warning about the incoming El Niño are careful to situate it within a larger and more troubling context. The Pacific has been cooling since the peak of the 2023 to 2024 event, and that cooling phase, the La Niña period, was paradoxically when 2025 still managed to rank as the third hottest year on record. The world is now so warm that even its cooling phase is historically unprecedented. This asymmetry, where La Niña conditions that once produced near-average years now produce record-warm ones, tells a stark story about the underlying direction of travel.
NOAA made this explicit when it retired its traditional Oceanic Niño Index on February 1, 2026, replacing it with the new Relative Oceanic Niño Index (RONI). The old index compared Pacific temperatures against a fixed 30-year historical average, a method that struggled to keep pace with rapidly rising ocean baseline temperatures. Under the new standard, which compares temperatures against a rolling recent baseline, even recent La Niña events register as stronger than previously classified, and the 2023 to 2024 El Niño registers as slightly weaker. The data has not changed. What has changed is our ability to read it accurately against a planet that is warming continuously underfoot.
The WMO's five-year forecast paints a picture of an Arctic in accelerating crisis, with temperatures over the next five winters predicted to run nearly 3°C above the 1991 to 2020 average, more than triple the concurrent global anomaly. Arctic sea ice is forecast to continue shrinking through at least 2035. The Amazon faces predictions of drier than average conditions, raising the prospect of large-scale forest dieback that would release stored carbon and further accelerate warming in a vicious cycle. The NBC News analysis of the WMO outlook noted that if the next five years do average above 1.5°C, it will mean the planet has warmed a quarter of a degree Celsius in a single decade, roughly 25% faster than the warming rates seen in previous decades.
What the World Must Do — And What It Has Not Yet Done
The WMO's June bulletin is explicit that its function is not merely to document what is happening but to mobilize action. The El Niño and La Niña Updates it produces are described as "the world's most authoritative source of information for governments, humanitarian agencies and climate-sensitive sectors like agriculture, health, energy and water management." They are designed to enable early action: stocking food reserves before prices spike, pre-positioning medicines and vaccines before disease outbreaks, reinforcing flood defenses before the rains arrive. The lead time between a WMO warning and a peak El Niño event is typically six to twelve months, exactly the kind of preparation window that saves lives if used and costs lives if squandered.
UN Secretary-General António Guterres used language in his June 2026 video address that made unmistakably clear the stakes of the moment. "The science is clear: El Niño is arriving on our doorstep in the coming months with 90% certainty. The world must treat it as the urgent climate warning it is," he said, before calling for an end to fossil fuel dependence, an acceleration of the renewable energy transition, and the delivery of early warning systems for all of the world's most vulnerable communities, the latter being a target the WMO has set as a global goal for 2027.
"The only effective response is climate action equal to the crisis — ending the addiction to fossil fuels, accelerating the shift to renewables, protecting the most vulnerable, and delivering early warning systems for all."— UN Secretary-General António Guterres, June 2, 2026
The gap between that aspiration and current reality remains vast. As of 2026, roughly one-third of the world's population still has no access to adequate early warning systems for climate and weather events, with the most acute gaps in sub-Saharan Africa and parts of South and Southeast Asia, precisely the regions most exposed to El Niño's worst impacts. Global investment in climate adaptation remains a fraction of what scientists say is needed. And global greenhouse gas emissions, despite the rapid growth of renewable energy, have not yet peaked at the planetary scale necessary to stabilize the climate.
What El Niño of 2026 will ultimately deliver in terms of magnitude and regional devastation remains to be determined. Most forecast models suggest it will be at least moderate in strength and possibly strong, but the so-called spring predictability barrier, a period of reduced forecast skill in the Northern Hemisphere spring, means that exact peak intensity is not yet determinable. What is already knowable is the direction: warming Pacific waters, rising global temperatures, stressed food systems, and a planet that has no cooling buffer left. The WMO has lit the warning flares. The question is whether governments, businesses, and communities will use the months remaining to prepare before the wave arrives.
Sources and further reading: WMO: Prepare for El Niño (June 2, 2026) · WMO: Likelihood Increases of El Niño (April 24, 2026) · WMO Global Annual-to-Decadal Update (May 2026) · Nature Climate Change: Enduring Impacts of El Niño on Life Expectancy (2026) · World Bank: Food Security Update (2026) · Climate Home News: El Niño and the 2027 Heat Record
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