El Niño has officially started, according to NOAA, marking the return of a climate pattern that can reshape weather across the globe for months. The warm phase develops when unusually heated water spreads across the central and eastern tropical Pacific, influencing rainfall, storms, and ocean conditions far beyond the region itself.
Why this El Niño stands out
Forecast models now suggest a 63% chance that the event could become very strong by late 2026, with the peak expected around November to January. That would place it among the most intense El Niño episodes in the modern record. What makes this one especially notable is the speed of the transition: the Pacific moved from La Niña to El Niño in a short time, while ocean temperatures were already elevated.
Scientists also note that the event is unfolding on a warmer planet, which raises the baseline for heat, drought, and ecosystem stress. El Niño itself is a natural cycle, but its effects can be amplified when global temperatures are already high.
Possible regional effects
The strongest early impacts are often seen around the Pacific. Northern Peru and southern Ecuador can face heavier rain and flooding, while warmer coastal waters may weaken nutrient-rich upwelling that supports marine life and fisheries.
In other regions, the pattern often shifts the odds toward drier conditions in Indonesia, Australia, and parts of southern Asia, while some areas in southern South America, the southern United States, the Horn of Africa, and central Asia may see increased rainfall risk. El Niño can also change storm behavior by reducing Atlantic hurricane potential while favoring activity in parts of the eastern and central Pacific.
For agriculture, water management, and energy planning, the next months are critical. Seasonal forecasts can help communities prepare earlier for heat, rainfall swings, and changing ocean conditions.
Looking ahead to 2027
Because El Niño often delivers part of its global warming signal after it peaks, the broader temperature impact may be felt most clearly in 2027. If the event strengthens as expected, it could raise the global baseline and intensify regional extremes at the same time.
For now, the message is clear: this is a moment for preparation, not alarm. If the forecast holds, El Niño could become a powerful test of how well climate systems, cities, and industries adapt to a more volatile future.