La Niña Alert: Vietnam Braces for Heavy Rainfall, Flooding in Central, Delta Regions
Meteorological agencies worldwide have sounded the alarm, predicting a high likelihood of La Niña between October and December 2025. This phenomenon, with a 70-71% chance of occurrence, brings significant risks, particularly for Vietnam's Central region.
La Niña is known to boost heavy rainfall in the Central region by 9-19% compared to averages. Historically, La Niña years see such events 4.6 times more frequently than El Niño phases. Provinces from Thanh Hoa to Khanh Hoa are particularly vulnerable to flash floods and landslides during these periods.
As La Niña sets in, the risk of urban inundation in the Red River Delta increases, especially if heavy rains coincide with late-season typhoons. Meanwhile, the Mekong Delta faces compound flooding due to rising Mekong River levels, high tides, and monsoon-driven sea level rise. The probability of La Niña eases to 54-70% through the winter and drops below 55% in early 2026, but the chance of returning to neutral conditions rises to 55-74% in the same period.
La Niña's impact on Vietnam is severe and far-reaching. With a 70-71% chance of occurrence, it's crucial for authorities and residents to prepare for increased rainfall and potential flooding, particularly in the Central, Red River Delta, and Mekong Delta regions.
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