A massive surge of warm water deep beneath the Pacific Ocean has reached the coast of South America, stiffening the resolve of climate scientists who now warn that the world may be facing one of the most formidable El Niño events in decades. This downwelling Kelvin wave, a subsurface pulse of heated water moving eastward along the equator, is suppressing the usual upwelling of cooler currents and setting the stage for a phenomenon that models suggest could intensify into a so-called “Súper El Niño” by the second half of the year. Viewed from the great meteorological centres of the United States and Europe, the anomaly in the Niño 3.4 region—where sea surface temperatures rise more than two degrees Celsius above normal—has only been exceeded four times since 1950, in the catastrophic cycles of 1972, 1982, 1997 and 2015. Each of those years brought cascading disasters, and the prospect of a fifth such episode is concentrating minds across the globe.

From the Indian subcontinent, the signals are especially ominous. The city of Chennai, still scarred by the devastating floods of 2015 that paralysed the metropolis during the last strong El Niño, now finds itself in the crosshairs once again. Meteorologists in New Delhi note that the same oceanic dynamics that amplified the 2015 monsoon now threaten to repeat themselves, with the likelihood of extreme rainfall over southeastern India rising sharply. In sharp contrast, authorities in Colombia’s Norte de Santander department are bracing for the opposite extremity: the regional environmental corporation Corponor has issued a circular urging municipal governments and public utilities to prepare for a severe drought from the second half of the year, with the most acute water shortages projected between September and December. More than 200 Colombian municipalities are already on alert, the national weather service Ideam having calculated a 61 percent probability that El Niño will affect the country.

Further south, the state of Paraná in Brazil is preparing for yet another distinct pattern. The Paraná Environmental Monitoring System forecasts above-average rainfall across all regions from the winter of 2026, with precipitation expected to be particularly intense and persistent in the southern half of the state. This local projection underscores the fractal nature of El Niño’s impact: the same planetary-scale warming that desiccates one region can deluge another, as the altered wind circulation draws moisture from the Amazon basin toward the South Atlantic. Meanwhile, analysts in London and Washington are drawing unsettling comparisons with the super El Niño of 1877, a catastrophe that, according to historical accounts, contributed to the deaths of millions through famine and disease across Asia, Africa and South America. The question being asked in policy circles is whether the vastly improved forecasting and early-warning systems of the twenty-first century will prove sufficient to prevent a repetition of that tragedy.

The answer remains uncertain. Even as the probabilities harden, a note of caution threads through the scientific community: models can still diverge, and the precise timing and intensity of the event are far from settled. Yet the convergence of indicators—the Kelvin wave, the warming sea surface, the historical analogues—has prompted the world’s leading climate prediction centres to flag the 2026–2027 ENSO cycle as a potential candidate for a super El Niño. For governments from India to Colombia to Brazil, the narrow window before the phenomenon peaks is not a moment for complacency. The coming months will test not only the resilience of infrastructure and emergency services but also the collective capacity of a globally literate civilisation to learn from the mistakes of a previous era. The stakes, measured in lives and livelihoods, could scarcely be higher.