Super El Niño 2026 Ties Record Months Before Its Peak

The tropical Pacific has tied its strongest super El Niño reading ever recorded, and the phenomenon is still months away from its expected peak. According to a Carbon Brief analysis by climate scientist Zeke Hausfather, the sea-surface temperature anomaly in the Niño 3.4 monitoring region reached 3.07 degrees Celsius above the long-term average on September 19, matching the mark set during the powerhouse 2015–16 event. The timing is what startles researchers: El Niño episodes typically crest during the Northern Hemisphere winter, yet this one has already reached record intensity in September.

Analysis of 14 climate models suggests the anomaly could climb to 4.0 degrees Celsius by November and December. If that projection holds, this would rank as the largest El Niño in at least 1,000 years. Hausfather told Phys.org by email that September is "very likely to have the highest monthly anomalies on record." The Guardian, which put the story on its front page, quoted him calling the latest figures "mind-blowing."

To grasp the scale, consider the yardstick: scientists classify any Niño 3.4 warming above 0.5 degrees Celsius as a regular El Niño, and anything above 2 degrees as a super event. The current reading sits far beyond the super threshold. It also arrived with startling speed — the event began in June and has outpaced the comparable stages of the great 1997–98 and 2015–16 episodes by more than a full degree, reported by Austrian outlet Austrian Press citing the Carbon Brief data.

This super El Niño is already reshaping weather worldwide

The effects are not theoretical. Across Central America, the strengthening pattern has delivered the worst drought in living memory for many communities, with livestock dying in parched fields. The Associated Press reported that animals are dropping dead as the drought grips the region, and photographs from Honduras in early September showed desiccated corn crops and a dead cow in the village of Los Piches. The damage follows the pattern scientists expect: El Niño shifts rainfall thousands of kilometers, baking some regions while drowning others.

The United States just closed the hottest June-through-August period in the 132 years of NOAA's records for the lower 48 states, according to Phys.org, and a rare September heat dome then pushed temperatures toward 104 degrees Fahrenheit for more than 41 million people under heat alerts. Looking ahead, the Los Angeles Times reported that California has declared a statewide emergency ahead of projected epic El Niño storms. In Colombia, authorities declared a "public calamity" as a wildfire burned through mountains and surrounded a tourist town, reported by the Associated Press.

Europe and Africa are rewriting record books too. Portugal logged an unprecedented late-September heat wave with 40.4 degrees Celsius at Alvega, while Spain endured its hottest and longest summer on record. Morocco recorded its hottest start to September since 1981, with Sidi Slimane hitting 47.1 degrees. Meanwhile Libya's Murzuq municipality declared its highest level of emergency after torrential rains killed and injured residents, according to the Libya Observer.

The human toll could be staggering

A forecast from the Climate Impact Lab, a research collaboration involving scientists at the University of Chicago, projects that this event could cause up to 451,000 excess heat-related deaths between June 2026 and February 2027, with roughly 239,000 of those falling in the next six months. The model estimates 44 percent more extremely hot days than a normal year would bring. The heaviest losses are expected in the Global South: Nigeria alone faces about 31,000 additional heat deaths, followed by Indonesia at 19,300 and Sudan at 17,600. The Sahel region spanning Niger, Chad, Nigeria, and Sudan could see 66,800 heat-induced deaths, while the Philippines, Vietnam, Thailand, and Cambodia are projected to suffer 19,400 combined. The figures were reported by the New York Post.

The risks are not only heat. Writing in the journal Nature, Hausfather noted there is a better than 90 percent chance this becomes the strongest El Niño observed since records began in the 1870s, and warned of sharply contrasting weather risks around the world. For the Horn of Africa, the clearest danger is unusually heavy short rains and flooding from October through December. The regional IGAD climate center gives a 90 percent chance of enhanced rainfall across southern Ethiopia, central and southern Somalia, and northeastern Kenya, with seasonal totals topping 400 millimeters in parts of Somalia, Kenya, and the Lake Victoria basin — alongside warmer-than-average temperatures throughout the region.

What this means for you

The biggest near-term consequence may land in 2027. Because El Niño's warming influence lags behind the Pacific by several months, the extra heat is expected to pile onto an atmosphere already warming from human-caused emissions. The Guardian reports that this double whammy could make 2027 "blow apart" previous records and become the hottest year ever recorded. For everyday life, that translates into higher air-conditioning bills, more dangerous outdoor work conditions, and pressure on food prices: the Associated Press has already flagged El Niño-driven drought in Asia as a risk for global food costs. (More on this beat: our Climate Emergency topic page.)

There is an important caveat worth knowing. NOAA has increasingly adopted a newer measurement called the Relative Oceanic Niño Index, which compares Niño 3.4 warming against warming across the entire tropical belt. On that metric the current event still sits below the all-time record — though scientists expect it to break that bar too. And this super El Niño is, at its core, a natural cycle — not a human invention. But as Swedish climate researcher Gustav Strandberg told Deep Sea Reporter, the extreme intensity of this episode signals that climate change is fueling the phenomenon: in a warmer world, record-shattering El Niño temperatures become more likely, not less.

The timeline from here is straightforward. The event began in June, record readings arrived in September, and the projected peak lands in November and December. Residual effects — above-normal temperatures and heat-related deaths — are expected to linger into spring and next summer. For students, outdoor workers, and anyone planning travel through 2027, the message from the data is simple: the Pacific's tantrum is just getting started, and its fingerprints will be on the weather for many months to come. Track the latest on our Climate Emergency page.

Sources: Carbon Brief daily briefing; New York Post on the record; New York Post on the heat-death forecast; Phys.org/AFP on record territory; Big3Africa on the Nature analysis; Deep Sea Reporter on climate links.