Southern Vietnam experiences 6 days of rain, increasing the risk of flooding.

Recently, due to the influence of the tropical convergence zone, Ho Chi Minh City and the southern provinces have experienced heavy rainfall . Particularly in Ho Chi Minh City, numerous areas have been severely flooded in recent days, making it difficult for people to travel on the roads.

PHOTO: NHAT THINH

According to the National Center for Hydro-Meteorological Forecasting, on the afternoon and night of October 6th, the eastern part of Gia Lai province, the Central Highlands and the Southern region will experience showers and thunderstorms with rainfall generally ranging from 10 to 30 mm, and some areas experiencing heavy rain exceeding 70 mm.

From October 7th to 11th, Southern Vietnam will continue to experience thunderstorms, with some areas experiencing heavy to very heavy rain; some areas will see concentrated rain in the afternoon and evening. Therefore, the risk of flooding in this region will continue to increase in the coming period.

Regarding rainfall forecasts from now until the end of 2026, the meteorological agency stated that in October and November, moderate to heavy rainfall is expected to be less frequent than the multi-year average, mainly concentrated in the area from Ha Tinh to Hue and the South Central coastal region; the rainy season is likely to end early in the Central Highlands and Southern regions.

Specifically, in October, total rainfall in the Northern region was generally 5-20% higher than the multi-year average; other areas generally experienced rainfall 5-20% lower than the multi-year average, especially in Quang Tri - Hue, the South Central coastal region and the Central Highlands, where it was 20-40% lower than the multi-year average for the same period.

In November, total rainfall in the Northern region and from Thanh Hoa to Ha Tinh was 10-30% higher than the multi-year average; in the Quang Tri-Lam Dong region, it was generally 20-40% lower than the multi-year average; and in the Southern region, it was generally 5-15% lower than the multi-year average.

In December, total rainfall in the Northern region and Thanh Hoa - Ha Tinh was 5-20 mm higher than the multi-year average; other areas experienced 5-20 mm lower rainfall than the multi-year average, while the South Central coastal region experienced 50-100 mm lower rainfall than the multi-year average.

Regarding the hydrological situation, in October, the rivers in Northern Vietnam are likely to experience 1-2 minor floods. From November to December, the water levels of the rivers will gradually decrease. Inflows to large reservoirs in the Northern region will be deficient compared to the multi-year average by 10-30%.

Rivers from Thanh Hoa to Ha Tinh are likely to experience 1-2 flood events, with flood peaks reaching alarm level 1-2, and some rivers exceeding alarm level 2. From November to December, river water levels will change slowly.

From October to November, floods occurred on rivers from Quang Tri to Lam Dong, with flood peaks reaching alarm level 2-3, and some rivers exceeding alarm level 3. In December, river water levels tended to gradually decrease.

In the first half of October, the upstream water levels of the Mekong River experienced a surge, with the highest water levels on the Tien River at Tan Chau and the Hau River at Chau Doc station exceeding alarm level 1 by 0.1 - 0.3 m, then gradually decreasing from the second half of October to December; during high tides, water levels at downstream stations of the Mekong River reached alarm level 2 - exceeding alarm level 3.