Federal scientists are sounding the alarm: after months of watching the Pacific Ocean’s subtle shifts, the National Oceanic and Atmospheric Administration (NOAA) has issued an El Niño watch, warning that the world could be on the verge of a potentially severe climate event. The most recent update, released on March 12, 2026, outlines a rapidly increasing likelihood that El Niño—a periodic warming of waters in the central and eastern Pacific—will develop this summer. And not just any El Niño: there’s a significant chance it could become a “super El Niño,” a phenomenon that has been linked to record-breaking heat, floods, droughts, and disruptions to weather patterns across the globe.
NOAA’s Climate Prediction Center estimates an 80% chance that El Niño will take hold as soon as August 2026, up sharply from a 60% probability just a month earlier. The agency’s forecast also places the odds of a super El Niño—defined as sea surface temperatures at least 1.5°C above average for several months—at about one in three by autumn. That would make the upcoming event potentially as strong as the 2023-2024 El Niño, which shattered global temperature records and pushed Earth’s climate past the long-feared 1.5°C warming threshold for the first time, according to reporting from The Weather Channel and The Washington Post.
But what exactly is El Niño, and why does it matter? The phenomenon is part of the broader El Niño–Southern Oscillation (ENSO) cycle, which toggles between warming (El Niño) and cooling (La Niña) phases in the Pacific. During El Niño, the usual east-to-west trade winds along the equator weaken, allowing warm water previously pushed toward Asia to slosh back east toward the Americas. This seemingly subtle shift unleashes a cascade of changes. Warmer-than-average waters in the Pacific disrupt atmospheric circulation, nudging jet streams, and, in turn, altering rainfall, temperature, and storm patterns around the world.
“Even though the evidence is still early, this could be a very significant event in 2026 and lingering into 2027,” Daniel Swain, a climate scientist at the University of California, told NPR. He explained that El Niño acts as a release valve for heat stored in the deeper oceans, which then raises global average temperatures. Zeke Hausfather, a research scientist at Berkeley Earth, added, “If a strong El Niño does develop, it’ll boost temperatures in 2026 a bit, but it will have a particularly large effect on temperatures in 2027 and put that year on track to probably be the warmest year on record after 2024.”
Indeed, the last strong El Niño, which lasted from summer 2023 through late winter 2024, helped make those years the hottest ever recorded. The impacts were tangible: much of the Midwest saw above-average temperatures, while the Plains experienced wetter-than-average conditions. Globally, the event contributed to more extreme droughts and rainfall, as well as devastating wildfires in some regions, according to NPR and NOAA data.
Looking ahead, the implications for the United States are complex and regionally varied. In the South, El Niño winters are typically wetter and cooler—a potential relief for drought-stricken areas and a possible damper on wildfire activity. However, meteorologists caution that one season of increased rainfall may not be enough to fully replenish depleted reservoirs, especially in areas like the Southwest where drought conditions are severe. For the North, the pattern often brings drier and warmer winters, a shift that could have its own set of consequences for agriculture and water supplies.
One of the most closely watched effects of El Niño is its impact on hurricane season, especially for states like Florida. The increased wind shear associated with El Niño tends to suppress Atlantic hurricane formation, potentially leading to a quieter season. “As we get closer to the start of hurricane season, confidence is growing that this might be the quietest season since 2015, unless something very unusual happens,” said Andy Hazelton, an associate scientist at the University of Miami, as reported by USA TODAY NETWORK FLORIDA. But meteorologists are quick to add a caveat: even in El Niño years, it only takes one major storm to cause catastrophic damage, as history has shown with hurricanes like Andrew and Michael.
For the Northeast, El Niño’s influence is more subtle but still notable. Historically, these years bring a more active southern storm track, which can mean slightly wetter-than-average autumns and milder temperatures. The jet stream tends to track farther south, allowing warmer air to linger over the eastern United States. However, as CT Insider notes, these are broad seasonal tendencies rather than guarantees—day-to-day weather will still be shaped by the usual mix of cold fronts, high-pressure systems, and coastal storms.
Globally, the stakes are even higher. El Niño’s warming effect can exacerbate heat waves, intensify droughts in some regions, and trigger heavier downpours in others. “It does mean more heat waves and tangibly warmer temperatures, but maybe the more important thing is what it means for everything else: more energy for storms, heavier downpours, more intensive droughts, more extreme wildfires,” Swain emphasized to NPR. The interconnectedness of these shifts means that communities thousands of miles apart can feel the effects of a single climate event unfolding in the Pacific.
Yet, as the likelihood of a super El Niño grows, concerns are mounting about preparedness. According to The Washington Post, the United States has seen significant reductions in Federal Emergency Management Agency (FEMA) staffing and delays in disaster agency reforms, raising questions about whether the nation is ready to respond to the kinds of extreme weather El Niño could trigger or intensify. Jesse Anttila-Hughes, an economist at the University of San Francisco, put it bluntly: “It’s like having a ship stall out in front of a tidal wave.”
It’s not all doom and gloom, of course. The ability to forecast El Niño months in advance gives governments, businesses, and communities a chance to prepare—whether that means shoring up infrastructure, adjusting planting schedules, or planning for potential relief from drought. But as NOAA’s lead ENSO forecaster Michelle L’Heureux cautioned, “Keep in mind, there is still a 1 in 5 chance that El Niño doesn’t form at all.” And, as always, nature can surprise us.
With the world watching the Pacific, the next few months will be crucial. Will the signs of warming seas and weakening trade winds translate into a super El Niño, or will the climate throw another curveball? Whatever unfolds, the story of El Niño 2026 is already shaping up to be one of the most closely watched climate events in recent memory.