As of 7:00 a.m. on November 6, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.83 m; water flow to the lake reached 2,309 m3/s; total discharge was 592 m3/s.
Implementing the inter-reservoir operation process in the Red River basin, Hoa Binh Hydropower Plant closed 1 bottom spillway gate at 3:00 p.m. on November 5, 2025 to stabilize downstream flow.
Previously, closely following the developments of the rainy weather situation that has lasted for many days, Hoa Binh Hydropower Plant was ordered to open 1 bottom spillway gate at 10:00 p.m. on November 4, 2025.
At Tuyen Quang Lake, by 7:00 a.m. on November 6, the upstream water level reached 119.63 m; the water flow to the lake reached 481 m3/s; the total discharge was 690.62 m3/s. Implementing the inter-reservoir operation process in the Red River basin, Tuyen Quang Hydropower Plant opened 1 bottom spillway gate of Tuyen Quang Hydropower Plant at 10:00 a.m. on November 5, 2025.
As of 7:00 a.m. on November 6, Son La Lake had an upstream water level of 216.5 m; water flow to the lake was 1,754 m3/s; total discharge was 2,107 m3/s. Currently, the unit has closed all bottom spillways, only maintaining power generation through generators to regulate the flow downstream.
At Lai Chau Lake, by 7:00 a.m. on November 6, the upstream water level reached 295 m; the water flow to the lake reached 1,746 m3/s; the total discharge was 1,746 m3/s. Currently, Lai Chau Hydropower Plant is opening a facial opening.
A similar situation occurred at Thac Ba Lake, where the upstream water level reached 58.07m; the water flow to the lake reached 214m3/s; the total discharge was 321.44m3/s. Currently, Thac Ba Hydropower Plant also maintains 1 spillway.
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, November 6, storm No. 13 Kalmaegi will approach the mainland of Central Vietnam, causing widespread heavy thunderstorms.
It is forecasted that by 7:00 p.m. on November 6, the center of the storm will be at about 13.7 meters of Vi Bac - 110.3 degrees East longitude, about 120km East Southeast of Quy Nhon (Gia Lai). The storm is moving west-northwest at a speed of about 25km/h.
The strongest wind near the storm center is level 14, gusting to level 17. Natural disaster risk level: level 4 for the Central East Sea area (including the sea area north of Truong Sa special zone), the sea area off the coast from Quang Ngai to Dak Lak (including Ly Son special zone); the mainland east of Quang Ngai to Dak Lak; Level 3 for the sea area from South Quang Tri to Da Nang city (including Cu Lao Cham island) and Khanh Hoa; the mainland from South Quang Tri to Da Nang city and the northern area of Khanh Hoa province.
The storm will move inland Vietnam tonight and early tomorrow morning, November 7.
Due to the impact of storm No. 13, from this evening, coastal areas from Hue City to Dak Lak should be on guard against rising sea levels accompanied by large waves causing flooding in low-lying areas, waves of dike overflow, coastal roads, and coastal erosion, slowing flood drainage in the area.
All ships, boats, and aquaculture areas in the above-mentioned dangerous areas are strongly affected by thunderstorms, whirlwinds, strong winds, large waves, and rising sea levels.
