As of 9:00 a.m. on October 20, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.9m; water flow to the lake reached 2,922m3/s; total discharge was 1,205m3/s.
Implementing the inter-reservoir operation process on the Red River basin, Hoa Binh Hydropower Plant closed 1 bottom spillway gate of Hoa Binh Hydropower Plant at 5:00 p.m. on October 16. When a bottom spillway is closed, the water level will decrease.
Previously, at 3:00 p.m. on October 14, Hoa Binh Hydropower Plant opened a bottom spillway.
At Tuyen Quang Lake, by 9:00 a.m. on October 20, the upstream water level reached 119.13 m; the water flow to the lake reached 653 m3/s; the total discharge was 349.6 m3/s. Implementing the inter-reservoir operation process in the Red River basin, Tuyen Quang Hydropower Plant closed 1 bottom spillway gate of Tuyen Quang Hydropower Plant at 5:00 p.m. on October 16.
As of 9:00 a.m. on October 20, Son La Lake had an upstream water level of 215.1 m; water flow to the lake was 1,216 m3/s; total discharge was 2,135 m3/s. Currently, the unit has closed all bottom spillways, only maintaining power generation through generators to regulate the flow downstream.
A similar situation occurred in Lai Chau Lake, where the upstream water level reached 295m; the water flow to the lake reached 1,323m3/s; the total discharge was 1,220m3/s. Currently, Lai Chau Hydropower Plant has also closed all bottom spillways, only operating power generation.
At Thac Ba Lake, by 9:00 a.m. on October 20, the upstream water level reached 57.98 m; the water flow to the lake reached 318 m3/s, the total discharge was 373.02 m3/s. Currently, Thac Ba Hydropower Plant maintains 2 floodgates.
In the context of complicated heavy rain, the flexible operation of hydroelectric reservoirs, ensuring safety downstream is considered a key factor in natural disaster prevention in the North.
According to the latest weather forecast from the National Center for Hydro-Meteorological Forecasting, storm No. 12 Fengshen has entered the eastern sea area of the North East Sea, becoming the 12th storm of 2025.
It is forecasted that in the next 24 hours, storm No. 12 Fengshen will reach its strongest intensity of level 11, gusting to level 13.
On land, due to the influence of the storm circulation combined with cold air, winter wind disturbances and terrain effects, from October 22 to 27, the area from Ha Tinh to Quang Ngai is highly likely to experience widespread heavy rain, lasting for many days, locally very heavy rain.
There is a high risk of flash floods and landslides in mountainous areas, flooding in low-lying areas and urban areas. Localities need to pay attention to safe operation of hydroelectric and irrigation reservoirs before, during and after the storm; prepare response plans for flood scenarios on rivers from Quang Tri to Quang Ngai that are likely to reach alert level 3 and exceed alert level 3.
