The National Oceanic and Atmospheric Administration announced Thursday that an intensifying El Niño is heading toward historically strong levels, with an 81% chance of reaching the top strength category by fall. This year's El Niño has already zipped past the weak stage and is now considered moderate—all within the span of a single month. Ocean temperatures in key Pacific regions are at or near record highs for this time of year, partly because the warming occurs on top of ocean heating from human-caused climate change, according to meteorologists.
The convergence of natural climate cycles with human-driven warming creates a compounding crisis that experts say we haven't fully witnessed before. Emily Becker, a University of Miami scientist who works with the NOAA El Niño forecast team, called it "pretty extreme," adding, "Not unprecedented, but very unusual." Becker said this El Niño will rival the 1997-1998 El Niño, while other meteorologists predict this one could be even stronger. The last comparable event, 28 years ago, offers a sobering historical marker: the World Bank documented that the 1997 El Niño led to 23,000 deaths in weather disasters, increased poverty rates in some countries, and cost governments as much as $45 billion.
Daniel Swain, a climate scientist with University of California Agriculture and Natural Resources, stressed that "this is not a run-of-the-mill El Niño." He explained that unlike past super El Niños, this one arrives on top of considerable background warming from the burning of coal, oil, and natural gas. "We might not expect to see the exact same impacts from this event as we have seen in historical ones," Swain cautioned, suggesting the actual consequences could be worse than historical precedent suggests.
Who Bears the Burden
The impacts won't be distributed equally. A very strong El Niño makes extreme weather conditions more likely, increasing the chances for most of the southern United States to experience a rainier winter. It also boosts the likelihood of warmer winter conditions for the northern United States and Canada. Globally, the impacts are expected to include a drier Indonesia and a warmer and wetter eastern Pacific. These regional disparities mean that vulnerable populations in already-stressed agricultural regions face compounded risks to food security and economic stability.
The human cost of these weather disruptions falls hardest on communities with the least capacity to adapt. Developing nations that depend on stable agricultural systems face the prospect of simultaneous droughts and floods. The 23,000 deaths and $45 billion in losses from 29 years ago occurred in a world less prepared for climate extremes and with fewer resources dedicated to early warning systems and disaster preparedness.
The Intensifying Climate Crisis
Swain wrote in a blog post that El Niño acts as a "thermostat" for global climate by liberating years' worth of accumulated heat stored in the subsurface tropical Pacific Ocean and dumping it into the atmosphere, where it eventually dissipates—but not before warming the entire planet. Many climate scientists are predicting that 2027 will break the 2024 global high temperature record set by the last strong El Niño, according to the pent-up heat expected to be released.
Zack Labe, a climate scientist at Climate Central, said, "A strong El Niño would raise the odds of dramatic new climate records over the next 6 to 12 months," and said it could give a taste of an even warmer world to come. This projection underscores a critical reality: without aggressive action to reduce greenhouse gas emissions, these extreme events won't remain historical anomalies but will become the new normal.
One Silver Lining, With Caveats
El Niño usually dampens Atlantic hurricane season, which provides some relief for vulnerable coastal communities. Colorado State University, which pioneered hurricane season forecasts, dramatically reduced its prediction for the number of Atlantic storms on Wednesday due to increased confidence in a strong or very strong El Niño. The forecasters predict overall hurricane activity in the Atlantic will be "well below normal." This reduction in hurricane risk offers a narrow benefit, though it comes at the cost of intensified weather extremes elsewhere.
NOAA has tracked El Niños for 76 years, since 1950, giving scientists a substantial record against which to measure current conditions. That historical data makes the current trajectory all the more alarming: we're approaching territory that rivals the most destructive events in the modern record, but this time with an added layer of human-caused warming that could amplify the damage.
Why This Matters:
This El Niño event crystallizes the intersection of natural climate variability and human-caused climate change—a combination that threatens to exceed the adaptive capacity of vulnerable communities worldwide. The 23,000 deaths and $45 billion in economic losses from 29 years ago occurred in a climate system less disrupted than today's. A historic El Niño arriving atop decades of accumulated greenhouse warming means governments, public health systems, and agricultural infrastructure face unprecedented stress simultaneously. Communities that already struggle with poverty, food insecurity, and weak disaster preparedness will bear the heaviest burden. The convergence of these forces underscores why climate action isn't a future concern—it's an urgent matter of protecting vulnerable populations from immediate, cascading harms. Without substantial investment in climate resilience, disaster preparedness, and emissions reduction, the human and economic costs of this event could dwarf historical precedent.