El Niño Set to Return, Raising Global Temperature Concerns

Ever wonder how a shift of warm water thousands of miles away can affect the weather where you live? This year, the return of El Niño—a natural climate phenomenon—could significantly alter weather patterns globally, with heightened risks of extreme heat and unusual precipitation.

According to the National Oceanic and Atmospheric Administration (NOAA), there is an 80% chance that El Niño will emerge by autumn 2026, following a current phase of La Niña conditions. The El Niño phenomenon, characterized by warmer sea surface temperatures across the central and eastern Pacific Ocean, is expected to exacerbate climate change effects, raising global temperatures and triggering severe weather events.

This forecast is not just a matter of speculation. The Climate Prediction Center reported on March 19, 2026, that El Niño is likely to create conditions for above-average temperatures and below-average precipitation across the Northwest of the United States, including Oregon, Washington, Idaho, and Northern California. The predicted warmer and drier spring and early summer could persist through the end of the year, with an 82% chance that El Niño will still be present come winter.

"If you want to make a really strong El Niño, this is the way to start," said Oregon State Climatologist Larry O’Neill. He noted that the Pacific Ocean currently holds a deep reservoir of unusually warm water, supporting predictions of an impending El Niño. The odds of it being a strong event are estimated at 33%.

The impacts of El Niño are not confined to the U.S. The International Research Institute for Climate and Society at Columbia University has also estimated an 80% risk of El Niño developing by summer 2026. This aligns with forecasts indicating that the phenomenon will amplify global temperatures, potentially increasing them by 0.2°C to 0.3°C.

Historically, El Niño events occur every two to seven years and typically last between nine months to a year. The last episode, which lasted from 2023 to 2024, was the fifth strongest on record. It did not reach extreme levels, but its effects were notable.

During an El Niño, warmer waters affect atmospheric pressure patterns and trade winds across the Pacific. This can lead to wetter conditions across the southern United States, but drier conditions for regions like Southeast Asia and Australia. The consequences of these shifts can be severe, impacting agriculture, water supply, and even marine ecosystems.

For example, fishing stocks off the coast of South America can diminish during El Niño years due to reduced nutrient upwelling, which affects marine life. The droughts and flooding associated with the extreme 2015-2016 El Niño event impacted food security for over 60 million people, according to the UN Food and Agricultural Organization.

With the current La Niña phase expected to transition to neutral conditions by April, the stage is set for El Niño’s potential return. This transition is also occurring at a time when global temperatures are already elevated. The year 2024 saw temperatures reach 1.55°C above pre-industrial levels, marking it the hottest year on record. The following year, 2025, was the third hottest, largely due to La Niña's cooling effects.

Climate experts warn that if a strong El Niño develops, 2026 could surpass previous temperature records, potentially making it the hottest year ever recorded. This concern is echoed by Professor Dr. Fredolin Tajudin Tangang, who noted that Malaysia is already experiencing intense heat, exacerbated by the transition out of the Northeast Monsoon season.

"The hot weather we are experiencing now does not merely cause discomfort. It can also lead to more serious health risks, including heatstroke, which can be life-threatening," said Dr. Mohd Dzulkhairi Mohd Rani, a public health specialist. He cautioned that festive activities during the hot season could increase health risks, urging people to take precautions against heat-related illnesses.

El Niño's effects extend beyond immediate weather patterns. It also plays a role during the inter-monsoon phase, which brings unstable weather to regions like Malaysia. This phase can lead to flash floods and thunderstorms, particularly along the west coast of Peninsular Malaysia, where conditions are influenced by the Madden-Julian Oscillation (MJO).

During this inter-monsoon phase, suppressed convection can lead to hotter conditions, raising solar radiation exposure and decreasing cooling through evaporation. This scenario increases the likelihood of heatwaves, which can have serious public health ramifications.

But what does all this mean for you? If you live anywhere from the Pacific Northwest to Southeast Asia, you might experience a shift to warmer temperatures and to altered precipitation patterns. These changes can impact everything from your daily commute to agricultural yields and water availability.

So, what's next? The NOAA and other climate agencies will continue to monitor these developments closely. The interplay between El Niño and global warming is complex, and scientists are still unraveling the full extent of these interactions. For now, the message is clear: the return of El Niño could have far-reaching consequences, and preparedness is key.

Whether you're a farmer, a city planner, or just someone who enjoys the outdoors, staying informed about these climate patterns is more important than ever. The potential for extreme weather events means that adaptation and resilience strategies will be necessary to mitigate the impacts of this natural phenomenon.

With El Niño on the horizon, the world is bracing for a season of change—one that could redefine weather patterns and challenge our responses to climate change.