The warm water stops moving. It pools and spreads.
El Niño is a natural ocean-atmosphere interaction that redistributes global rainfall, but extreme versions now cause severe droughts in typically wet regions and torrential floods elsewhere. Recent 'Niño Godzilla' episodes show ocean temperature anomalies exceeding 2.5°C above normal, devastating marine food chains and intensifying tropical cyclones with catastrophic coastal impacts.
- El Niño first formally documented in 1892 by Peruvian captain Camilo Carrillo
- Extreme 'Niño Godzilla' events show ocean temperature anomalies exceeding 2.5°C above normal
- Mexico City broke its temperature record in May 2024 at 34.7°C during El Niño-to-La Niña transition
- Extreme El Niño collapses marine food chains and intensifies tropical cyclones
Extreme El Niño events, dubbed 'Niño Godzilla,' are intensifying due to global warming, causing devastating climate disruptions including droughts, floods, and marine ecosystem collapse across multiple regions.
For centuries, Peruvian fishermen noticed something strange happening near Christmas: the ocean would warm up. The cold Pacific waters that normally hugged the South American coast—around 4 degrees Celsius, nutrient-rich and teeming with life—would suddenly turn hot and barren. They named this anomaly after the Christ child, calling it El Niño. It wasn't until 1892 that a Peruvian captain named Camilo Carrillo formally documented what the fishermen had long observed, marking the first scientific record of a phenomenon that would eventually reshape how we understand the entire planet's climate.
What happens in the Pacific doesn't stay in the Pacific. Under normal conditions, trade winds push warm water westward across the ocean toward Asia, allowing cold, nutrient-rich water to rise along the American coast in a process called upwelling. This rising water feeds the base of the marine food chain and sustains some of the world's most productive fisheries. But when El Niño arrives, those trade winds weaken or reverse. The warm water stops moving west. Instead, it pools and spreads across the central and eastern Pacific, transferring enormous amounts of energy into the atmosphere. The result is a global climate reshuffling: regions that normally receive abundant rain—Indonesia, Australia—suffer severe droughts, while Peru and Ecuador get battered by torrential downpours and floods.
For thousands of years, this cycle occurred naturally, a rhythm of the ocean as predictable as seasons. But something has changed. In recent years, scientists have recorded El Niño events so extreme they've earned a nickname that sounds like science fiction: Niño Godzilla. The term, popularized by the U.S. National Oceanic and Atmospheric Administration between 2015 and 2016, describes episodes where ocean temperatures spike more than 2.5 degrees Celsius above normal. María Luisa Machain Castillo, a researcher at Mexico's National Autonomous University, acknowledged that while "Niño Godzilla" isn't technically a scientific term, it captures something real about the scale of these events—a magnitude that defies the usual vocabulary of climate science.
The devastation is immediate and cascading. When the ocean warms this severely, the upwelling of cold water nearly stops. Nutrients vanish. Phytoplankton—the microscopic organisms that form the foundation of marine life—collapse. Fish populations decline. Seabirds and marine mammals starve. Fishing communities that have depended on these waters for generations watch their livelihoods disappear. The warm ocean also acts as fuel for tropical cyclones, allowing them to intensify with terrifying speed, threatening coastal populations across the Pacific. During the 2015-2016 Niño Godzilla event, East Africa experienced severe droughts that rippled through food systems across the region.
Mexico is feeling the effects now. A strong El Niño peaked between November 2023 and January 2024, then weakened into what appears to be a strong La Niña—the opposite phenomenon, characterized by abnormally cold Pacific waters. This abrupt transition has triggered intense heat waves across Mexico. In May 2024, Mexico City shattered its temperature record, reaching 34.7 degrees Celsius, surpassing a mark set in 1998—another year marked by an identical shift from extreme El Niño to strong La Niña. The pattern repeats, but each time it seems more intense.
Scientists are turning to the deep past to understand the future. By studying fossilized microorganisms embedded in ocean floor sediments, researchers can reconstruct climates from billions of years ago, creating a biological record of how the planet's systems have responded to warming before. These ancient snapshots reveal how El Niño has evolved under different conditions and offer clues about what a warmer world will bring. The message is clear: as global temperatures rise, the ocean's most powerful climate engine appears to be revving up. Understanding what lies in those deep sediments may be the only way to prepare for what's coming.
Citas Notables
The phenomenon doesn't just generate more rain—it redistributes it entirely, causing droughts in normally wet regions and torrential flooding elsewhere.— María Luisa Machain Castillo, UNAM researcher
While 'Niño Godzilla' isn't technically a scientific term, it helps convey the magnitude of these extreme events.— María Luisa Machain Castillo, UNAM researcher
La Conversación del Hearth Otra perspectiva de la historia
Why does the ocean warm up in the first place? Is it just random?
It's not random at all. Trade winds normally push warm water westward across the Pacific. When those winds weaken—and we're still not entirely sure why they do—that warm water stops moving. It pools up in the central and eastern Pacific instead of traveling toward Asia. That's when the whole system destabilizes.
And this has been happening for thousands of years?
Yes, but naturally, on a rhythm we could predict. What's different now is the intensity. The ocean is already warmer because of climate change, so when El Niño arrives, it arrives on top of an already-heated baseline. That's when you get these Godzilla versions.
What actually happens to people when El Niño gets extreme?
It depends where you live. In Peru and Ecuador, you get catastrophic flooding. In Australia or Indonesia, you get drought. But the real damage is in the ocean itself—the food chain collapses. Fish disappear. Fishing communities lose everything. And the warm water fuels hurricanes that can devastate entire coastlines.
How do scientists know what's coming?
They study the ocean floor. Tiny fossilized organisms in the sediment tell them what the climate was like thousands of years ago. It's like reading a biological diary of the planet. Those records show how El Niño has behaved under different warming scenarios.
So we're in uncharted territory?
Not entirely. We have a record. But we're adding a new variable—a warmer baseline ocean—to a system that's already powerful. That's what worries them.