First, What Is El Niño?
El Niño, which is Spanish for 'the boy', is a natural climate pattern that occurs every two to seven years. It's characterized by the unusual warming of surface waters in the central and eastern tropical Pacific Ocean. This isn't just a minor temperature
change; this massive body of warm water alters atmospheric circulation, affecting wind and rainfall patterns across the globe. Think of it as a giant heat engine in the ocean that can disrupt normal weather systems, increasing the risk of droughts in some regions and heavy floods in others. It's one phase of a larger phenomenon called the El Niño-Southern Oscillation (ENSO), which swings between the warm El Niño, a cold phase called La Niña, and neutral conditions.
The Pacific's Critical 'Thermometer'
Scientists don't monitor the entire Pacific Ocean to track El Niño. Instead, they focus on specific areas, with the most important being the Niño 3.4 region. This rectangular patch of the ocean, located in the east-central equatorial Pacific, is considered the primary indicator for ENSO events. When sea surface temperatures in this zone are consistently 0.5°C above the long-term average, an El Niño is officially declared. The magnitude of this temperature difference, or 'anomaly,' determines its strength—categorised as weak, moderate, strong, or, in extreme cases, very strong. The recent headline-making record was set right here, in the ocean's most sensitive and influential monitoring zone.
A New Global Heat Benchmark
The European Union's Copernicus Climate Change Service reported that in September, sea surface temperatures in the Niño 3.4 region hit a record high of 29.70°C. This temperature surpassed the peak readings from the historically powerful El Niño events of 1982-83, 1997-98, and 2015-16. The World Meteorological Organization (WMO) has confirmed the rapid strengthening, noting the temperature anomaly in August was already +2.5°C above normal. Forecasts suggest this could reach an unprecedented +3.7°C for the October-December period. This has led many scientists to label the current event a 'Super' or 'Godzilla' El Niño, signifying its potential to be one of the strongest since record-keeping began.
The Ripple Effect for India
For India, a powerful El Niño thousands of kilometres away has very local consequences. Historically, there is a strong link between El Niño and weaker summer monsoon rainfall. About half of all El Niño years have resulted in drought conditions in India, with nearly 80% seeing below-normal rainfall. The 2026 southwest monsoon has already finished with a significant rainfall deficit, damaging crops and depleting water reserves in several regions. The impact isn't just on the monsoon; a strong El Niño can also lead to warmer winters in many parts of India, as seen during the 2015-16 event. Furthermore, the warming of the Indian Ocean, a separate but compounding factor, can intensify these impacts, affecting everything from agriculture to marine ecosystems and fisheries.
What Should We Expect Next?
The current El Niño is expected to continue strengthening, likely peaking around December 2026 before it begins to weaken in the spring of 2027. However, its impacts on global climate can persist for months after the peak. For India, this means continued vigilance. Experts are watching for its influence on the upcoming northeast monsoon (which affects southern India), the winter season, and the cyclone season. While some research suggests El Niño can sometimes increase winter precipitation in northwestern India via western disturbances, the overall trend points towards a period of climatic disruption. A recent report projected that this 'Super El Niño' could contribute to thousands of additional heat-related deaths in India between September 2026 and February 2027 due to unusually high temperatures.
