Specifically, in the upland area, it is forecasted that the upstream of the Mekong River in the next 5 days in Tan Chau and Chau Doc will tend to increase with an average intensity of 4.0 cm/day.
By September 22, 2025, the largest water level in Tan Chau will reach 3.25 m, Chau Doc will reach 2.90 m. It is forecasted that the water level in the upper Mekong Delta in the next 10 days, the water level at stations in the Dong Thap Muoi area will generally be at or above the alarm level I (BDI) and will tend to increase slightly, some stations will tend to decrease.
Water levels at stations in the Long Xuyen Quadrangle are generally at or above BDI and tend to increase slightly, some stations tend to decrease. In particular, at Long Xuyen station (An Giang province), the water level is forecast to be quite high from BDII - BDIII.
In the central region, it is forecasted that in the next 10 days, the water level will be quite low and tend to increase until September 21 - 22, 2025 with an average intensity of 5.0 cm/day, then decrease slightly again and change with the tide.
For coastal areas, it is forecasted that in the next 10 days, the water level at stations in the East Coast will be quite low and tend to increase until September 21 - 22, 2025 with an average intensity of 7.0 cm/day, then decrease slightly again and change with the tide. In particular, at Ca Mau station (Ca Mau province), the water level is forecast to be above level BDIII. The water level at stations in the West coastal area is quite high and tends to decrease until September 24, 2025 with an average intensity of 3.0 cm/day, then increase again with an average intensity of 2.0 cm/day.
The upstream flood of the Mekong River is forecast to reach its highest level next week at 3.25 m in Tan Chau. With this flood level, basically the production protection infrastructure in the flooded areas of the Mekong Delta is not affected. However, for areas deep inside the plains, especially the central areas due to low terrain being water-adjacent areas, when high tides combined with inland rain will cause water levels to rise, which is generally forecast to be above BDIII in the next 10 days, so the risk of flooding will occur in these areas in the coming days.
"It is recommended that localities in the central and coastal areas of the Mekong Delta need to be on guard against flooding next week, especially during high tides from September 21 to 23, 2025. Localities at high risk of flooding include the central area of Ca Mau city, the areas inside the fields of the Quan Lo - Phung Hiep irrigation system, the Cai Lon - Cai Be irrigation system, and the Bac Ca Mau irrigation sub-region", the representative of this Department added.
