As of 6:00 a.m. on October 17, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 115.62m; water flow to the lake reached 3,434m3/s; total discharge was 1,167m3/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.
Previously, at 3:00 p.m. on October 14, Hoa Binh Hydropower Plant opened a bottom spillway.
Currently, the water level of the Da River downstream of the Hoa Binh Hydropower Dam at the Hoa Binh Ward measuring station is 11.97m. When a bottom spillway is closed, the water level will decrease.
At Tuyen Quang Lake, by 6:00 a.m. on October 17, the upstream water level reached 117.23 m; the water flow to the lake reached 1,037 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 6:00 a.m. on October 17, Son La Lake had an upstream water level of 215.04 m; the water flow to the lake was about 1,754 m3/s; the total discharge was 2,587 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 294.99m; the water flow to the lake reached 1,649m3/s; the total discharge was 1,649m3/s. Currently, Lai Chau Hydropower Plant has also closed all bottom spillways, only operating power generation.
At Thac Ba Lake, by 6:00 a.m. on October 17, the upstream water level reached 58.07 m; the water flow to the lake reached 455 m3/s, the total discharge was 547.34 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 National Center for Hydro-Meteorological Forecasting, today, October 17, the Northern region will have clouds, showers and thunderstorms in some places. The highest temperature is from 30 - 33 degrees Celsius.
The area from Thanh Hoa to Hue in the North is cloudy, with scattered showers and thunderstorms, locally heavy rain (rain concentrated in the evening and at night); the South is cloudy, with moderate rain, heavy rain and thunderstorms, locally very heavy rain.
The South Central Coast and Southern regions will have cloudy weather, moderate rain, heavy rain and thunderstorms, with some places having very heavy rain.
The Southern highlands will be cloudy with scattered showers and thunderstorms; in the late afternoon and at night, there will be scattered showers and thunderstorms, with some places having heavy rain; in the eastern part of Quang Ngai, there will be moderate rain, heavy rain and scattered thunderstorms, with some places having very heavy rain. Light wind. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
