Climate scientists are sounding the alarm over an unusually powerful El Niño now developing in the Pacific Ocean, with some models suggesting it could surpass any such event recorded in the past hundred years. Paul Roundy, Professor of Atmospheric and Environmental Sciences at the State University of New York at Albany, has warned that "the models and physical arguments based on tracking the progress of warm water suggest that the amplitude could be as high or potentially higher than any event in the last century" — raising the prospect of what researchers are calling a "super-El Niño."
El Niño is the warm phase of a recurring climate cycle known as the El Niño-Southern Oscillation (ENSO), which links ocean temperatures in the equatorial Pacific with atmospheric pressure patterns across the globe. First noted by 19th-century Peruvian fishermen — who named the current "El Niño" (Spanish for "the child") because it tended to arrive around Christmas — the phenomenon occurs when warm Pacific waters shift eastward toward the coasts of Ecuador, Peru, and northern Chile, disrupting the cold Humboldt Current that normally flows northward along South America's Pacific coast. In the 1960s, Norwegian-American meteorologist Jacob Bjerknes established that ocean and atmosphere are tightly coupled, making El Niño a truly global force. The northern hemisphere spring of 2026 unfolded in a neutral phase following a relatively mild La Niña, but short-term forecast models now indicate it is very likely that a full El Niño phase will be established by mid-year, intensifying sharply toward year-end.
If the event reaches the scale scientists fear, the consequences would be felt on nearly every continent. Historical precedent — particularly the powerful El Niños of 1982–83 and 1997–98 — points to severe flooding in Peru, northern Chile, East Africa, and parts of the southern United States, alongside devastating droughts in Southeast Asia, northeastern Brazil, and parts of Australia. Global average temperatures would likely spike by several tenths of a degree above the warming trend already driven by climate change. The Mediterranean basin, somewhat insulated from ENSO swings by its geography, could nonetheless experience above-normal temperatures and an elevated risk of extreme rainfall during a very intense event.
Why this matters extends well beyond regional weather disruption. A super-El Niño superimposed on an already warming baseline would almost certainly push global temperature records to new highs, accelerating pressure on ecosystems, food supplies, and water resources simultaneously in multiple parts of the world. Scientists stress that what was once understood as a localised current off the coast of South America is now recognised as one of the most powerful natural modulators of global climate — one whose next major episode, arriving in a warmer world than any previous one, may test the limits of both forecasting and preparedness.