Scientists Warn of Potential Record Breaking El Niño

A potentially record-breaking El Niño could reshape weather patterns and push global temperatures higher, with effects extending far beyond the tropical Pacific Ocean. Forecasts indicate the climate phenomenon could reach exceptional strength by December, raising concerns about extreme weather conditions worldwide, according to climate scientists cited by The New York Times on October 28, 2026.

El Niño develops when the eastern tropical Pacific Ocean becomes unusually warm. As trade winds weaken, warm water shifts eastward from the region near Indonesia, moving major areas of thunderstorm activity and disrupting atmospheric circulation. These changes can influence weather conditions across continents for months.

Scientists measure the phenomenon's strength by comparing Pacific Ocean temperatures with normal levels. Although forecasts can indicate broad seasonal trends, they cannot determine every storm or daily weather event months in advance.

Michelle L’Heureux, an El Niño expert at the National Oceanic and Atmospheric Administration, described the limits of long-range forecasting while explaining how the phenomenon influences seasonal outlooks.

“I see El Niño as an artist that is providing some broad-brush preliminary sketches on what to expect for upcoming seasons,” said Michelle L’Heureux. “But the details of the final portrait will be determined by events we cannot predict months in advance.”

The potential scale of the developing event has attracted attention after decades of destructive El Niño episodes improved scientific understanding and public awareness. The 1982-83 event killed thousands of people worldwide and prompted efforts in the United States and internationally to establish observation networks for forecasting future occurrences.

By the mid-1990s, scientists could forecast El Niño several months ahead, although reliably predicting its intensity remained difficult. The 1997-98 episode became a benchmark for exceptionally strong events, bringing catastrophic flooding to California and making the phenomenon widely recognized.

Ben Kirtman, a climate scientist at the University of Miami, recalled how the 1997-98 event became an explanation for a broad range of unusual weather conditions.

“It turned out that every single weather event during that ’97-98 cycle was, Oh, it must be El Niño,” Dr. Kirtman said.

Forecasters have signaled the possibility of a powerful event for much of the past year, with some predictive models indicating unprecedented strength. Kirtman cautioned that historical patterns are not guarantees because other atmospheric conditions and approaching storms also influence local weather.

El Niño's name originated in Peru, where fishermen observed tropical fish appearing unexpectedly near the coast around Christmas. They called the phenomenon “El Niño,” Spanish for “the Christ child,” before scientists established the connection between Pacific warming and weather changes worldwide.

The historical consequences have sometimes been severe. The 1877-78 El Niño contributed to devastating droughts in Brazil, India, China and parts of Africa, helping trigger famines estimated to have killed 3 to 4 percent of the global population.

Most El Niño events last less than a year. The warm water in the central and eastern Pacific generally dissipates during the early months of the following calendar year, allowing trade winds to return toward normal conditions.

However, its effects can continue after the ocean pattern weakens. The 1991 El Niño contributed to a below-average Atlantic hurricane season and delayed the start of the 1992 season, which officially began on June 1. The first storm did not develop until August, when Hurricane Andrew formed and rapidly intensified into one of the deadliest and most expensive hurricanes in United States history.

Scientists have also identified evidence that human-caused climate change may be associated with stronger El Niño conditions shifting more frequently toward the opposite phase, La Niña. For the United States, one notable consequence of La Niña is increased hurricane activity in the Atlantic Ocean.