As of 8:00 a.m. on October 27, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.59 m; water flow to the lake reached 676 m3/s; total discharge was 1,239 m3/s.
Implementing the inter-reservoir operation process in the Red River basin, Hoa Binh Hydropower Plant closed a bottom spillway gate at 11:00 on October 22 to stabilize downstream flow. When closing a bottom spillway, the downstream water level will gradually decrease.
At Tuyen Quang Lake, by 7:00 a.m. on October 27, the upstream water level reached 118.56 m; the water flow to the lake reached 415 m3/s; the total discharge was 187.77 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 6:00 p.m. on October 24.
As of 8:00 a.m. on October 27, Son La Lake had an upstream water level of 214.92 m; water flow to the lake was 256 m3/s; total discharge was 1,567 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 1,098m3/s; the total discharge was 1,095m3/s. Currently, Lai Chau Hydropower Plant has also closed all bottom spillways, only operating power generation.
At Thac Ba Lake, by 8:00 a.m. on October 27, the upstream water level reached 58.03 m; the water flow to the lake reached 270 m3/s, the total discharge was 268.03 m3/s. Currently, Thac Ba Hydropower Plant maintains all floodgates closed.
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.
National Center for Hydro-Meteorological Forecasting, today, October 27, the Northern region will have rain in some places; the clouds will decrease in the afternoon and evening. Cold at night and morning, mountainous areas are cold.
Due to the influence of the strengthening cold air combined with disturbances in the high-altitude East wind zone, the area from Ha Tinh to Da Nang city and the East of the provinces from Quang Ngai to Dak Lak will have moderate rain, heavy rain and thunderstorms, locally very heavy rain.
Heavy rain is likely to cause flooding in low-lying areas; flash floods on small rivers and streams; landslides on steep slopes.
