The world is bracing for a weather phenomenon that meteorologists say could reshape climate patterns and intensify extreme weather events across the globe in 2026.
The World Meteorological Organization (WMO) has issued an urgent warning: a strong El Niño event is developing and poised to exacerbate droughts, heavy rainfall, and heatwaves both on land and in the oceans. This climate disruption, experts warn, will pour fuel on the already blazing fire of global warming, threatening ecosystems, economies, and vulnerable communities worldwide.
El Niño, the warming of the central and eastern tropical Pacific Ocean, is a natural but powerful driver of global climate variability. According to the latest WMO update, there is now an 80% likelihood that El Niño conditions will prevail during June to August 2026, with probabilities rising to near or above 90% through November. Most forecast models suggest this event will be at least moderate in strength, with some indicating a potentially strong El Niño. The sea surface temperature anomalies in the Equatorial Pacific are already approaching the thresholds that define El Niño, fed by subsurface waters that are more than 6 degrees Celsius warmer than average, a substantial reservoir of heat that is pushing surface temperatures higher than usual. Concurrently, atmospheric indicators such as the Southern Oscillation Index (SOI), which tracks pressure changes between Tahiti and Darwin, Australia, align with the development of El Niño conditions (WMO; BoM).
The stakes could not be higher. United Nations Secretary-General António Guterres emphasized that this El Niño must be recognized as an urgent climate warning. “El Niño conditions will pour fuel on the fire of a warming world,” Guterres said, “The impacts will hit even harder, travel even farther, and cross borders with devastating speed.” His call to action was clear: the world must double down on climate efforts, ending fossil fuel dependence, accelerating the shift to renewables, protecting the most vulnerable populations, and expanding early warning systems to mitigate the coming impacts.
The last El Niño event in 2023-24 was one of the five strongest on record and played a significant role in pushing global temperatures to unprecedented highs in 2024. WMO Secretary-General Celeste Saulo warned that the coming El Niño could be just as impactful or even more so. “We need to prepare for a potentially strong El Niño event,” she said, “This will exacerbate drought, heavy rainfall, and increase the risk of heatwaves on land and in the ocean. Advance seasonal forecasts and early warnings are vital to save lives and cushion the blow to economies and communities.”
The global temperature outlook is grim. The warm ocean waters driving this El Niño are already causing above-average temperatures in nearly all parts of the world. Experts warn that 2026 could join 2024 as one of the hottest years on record, with some projections estimating an 86% chance that a year between 2026 and 2030 will surpass 2024’s record-breaking heat. This is not just a matter of uncomfortable weather; it carries serious implications for agriculture, water resources, energy demand, and human health.
Regions already vulnerable to drought are expected to face worsening conditions. In contrast, some areas will see intense and prolonged rainfall, increasing the risk of floods and landslides. The dual threat of drought and flood challenges disaster preparedness and humanitarian response worldwide. Heatwaves are likely to become more frequent and severe, not only over landmasses but also across ocean surfaces, which could further disrupt marine ecosystems and fisheries that millions depend on for food and livelihoods.
The atmospheric and oceanic shifts triggered by El Niño ripple through global weather systems. The Southern Oscillation Index, a key atmospheric indicator, is currently registering values indicative of a developing El Niño. This index measures the air pressure differences between the western and eastern tropical Pacific and is crucial for understanding the complex feedback loops that drive El Niño’s impacts. The ongoing anomalies in sea surface and subsurface temperatures enhance the likelihood of sustained and widespread climate disruptions over the coming months.
The timing of El Niño’s peak remains uncertain, but the consensus leans toward a development through late 2026, possibly extending into early 2027. This prolonged event will require sustained vigilance and coordination among governments, scientific institutions, and international organizations. The WMO is actively monitoring conditions and providing regular updates to inform decision-making in disaster management, agriculture, water management, and public health sectors.
In response to these looming threats, climate experts and policymakers are urging the formation of dedicated El Niño response groups. These would coordinate meteorological data with disaster preparedness, humanitarian aid, and climate adaptation strategies. The goal is to leverage expertise across fields to minimize harm and enhance resilience in the face of extreme weather amplified by climate change.
El Niño’s return is a stark reminder of the interconnectedness of natural climate variability and human-induced global warming. While El Niño is a cyclical event, its impacts are magnified by the rising baseline temperature of the planet. This convergence underscores the urgency of sustained and ambitious climate action to reduce greenhouse gas emissions and build adaptive capacity worldwide.
As communities around the world prepare for what could be a challenging year ahead, the message from scientists and world leaders is clear: El Niño is not just a weather forecast, it is a call to action. The coming months will test the resilience of our societies and the effectiveness of our collective response to climate risks. How well we heed this warning may well shape the planet’s environmental and humanitarian landscape for years to come.
For now, all eyes remain fixed on the tropical Pacific, where the simmering heat beneath the ocean’s surface heralds a season of uncertainty and challenge. The world watches, waits, and prepares, for a climate event that promises to remind us just how deeply our fate is tied to the rhythms of the Earth’s oceans and atmosphere.