Peru's Enfen warns of Niño Costero rains, heat records through mid-2027

Peru's Enfen forecasts an extraordinary Niño Costero event persisting into January 2027, with increased northern river flows from November and above-normal flows in the Rímac and Chillón rivers from December, plus possible heat records until summer 2027. The forecast is based on sea-surface warming and implies elevated flood and agricultural risk in northern Peru. Uncertainty remains on rainfall intensity and regional distribution.