Potentially record-setting El Niño raises odds 2026 becomes hottest year

A rapidly strengthening El Niño in the tropical Pacific is on track to become the most powerful such event observed since at least 1950, with scientists warning it could push 2026 and 2027 to record-setting global temperatures atop an already accelerating warming trend.

Unprecedented Convergence of Heat

Most computational models now indicate that the current El Niño could set records for intensity, an unusual convergence that has given forecasters rare confidence in their projections. The World Meteorological Organization projects above-average temperatures across nearly every region worldwide from August through October. UN Secretary-General António Guterres stated last week, "El Niño is strengthening—adding fuel to a planet already on fire," adding, "We are in uncharted territory".cnn+1

So far, 2026 ranks as only the third-hottest year on record, behind 2024 and 2025. But Berkeley Earth climate scientist Zeke Hausfather said the outlook is shifting quickly, calculating a 35 percent chance that 2026 will surpass 2024 as the hottest year — up from 7 percent in March. Former NASA climate scientist James Hansen expects 2026 to edge past 2024 by year's end, pointing to daily sea surface temperatures that have been at record levels on most days since June. Europe's Copernicus climate service reported that about 82 percent of the world's ocean surface has been affected by marine heat waves this year.indiatoday

Ecosystem Thresholds at Risk

Jong-Seong Kug, a professor at Seoul National University who models El Niño events using observational data and artificial intelligence, warned that a super El Niño "can push an already-stressed climate ecosystem across a critical threshold". He expressed particular concern about the Amazon rainforest shifting toward a drier, degraded state — potentially reversing the forest's role as a carbon sink and amplifying global warming long after the El Niño event subsides.livescience

Climate Central scientist Zachary Labe noted that while El Niño events always release stored ocean heat, greenhouse gases have trapped far more heat in the seas than in past cycles, meaning there is now more energy to be released. Still, he cautioned that the underlying driver of record warmth remains human-caused climate change, calling El Niño's contribution "just a tenth to two-tenths of a degree on top of that long-term trend".indiatoday

Preparing for What Comes Next

Jeffrey Shaman, a climate and public health expert at Columbia University, said the advance warning should allow cities to prepare for extreme heat, farmers to adjust crop choices, and aid organizations to position supplies in drought-prone areas. "Given the forecasts and the high degree of certainty, now is truly the time to prepare," he said. Kug offered a starker long-term view: asked whether emissions reductions are likely given current trajectories, he replied, "I don't think so. It's very difficult," suggesting that climate engineering techniques such as stratospheric aerosol injection may eventually become unavoidable choices.livescience+1