As of 6:00 a.m. on November 3, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.63 m; water flow to the lake reached 678 m3/s; total discharge was 671 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 5:00 a.m. on November 3, the upstream water level reached 119.91 m; the water flow to the lake reached 325 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 6:00 a.m. on November 3, Son La Lake had an upstream water level of 215.21 m; the water flow to the lake was 882 m3/s; the total discharge was only 82 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 786m3/s; the total discharge was 784m3/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 November 3, the upstream water level reached 58.1 m; the water flow to the lake reached 230 m3/s; the total discharge was 99.7 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.
According to the National Center for Hydro-Meteorological Forecasting, today, November 3, cold air continues to affect other places in the Northeast region. After that, the cold air will continuously strengthen, expanding the area affecting the Northwest, North Central and some places in the Central Central region.
At sea, the Gulf of Tonkin has northeast winds of level 6, sometimes level 7, gusting to level 8, rough seas, waves 2.0-3.5m high. The northern sea area of the North East Sea will have strong northeast winds of level 6-7, gusting to level 8-9, rough seas, waves 3.0-5.0m high.
The sea area from South Quang Tri to Quang Ngai: northeast wind level 5, sometimes level 6, gust level 7-8, rough seas, waves 2.0 - 3.0m high.
The Northern region, Thanh Hoa and the North of Nghe An will have rain, with some places having moderate rain. The Northeast and Thanh Hoa are cold, with some mountainous areas experiencing severe cold.
The Northwest and Nghe An regions will be cold, and from the night of November 3, the weather is likely to turn cold. The lowest temperature in this cold air mass is generally from 16-19 degrees Celsius, in mountainous areas it is below 15 degrees Celsius.
Also due to the influence of the strengthening cold air combined with disturbances in the high-altitude East wind zone, from the South of Nghe An to Quang Ngai and the East of Gia Lai province, there will continue to be widespread heavy rain.
With the prolonged bad weather in recent days, localities including Ha Tinh, Quang Tri, Hue City, Da Nang City, Quang Ngai, Gia Lai need to be on guard against the risk of flash floods, landslides, and land subsidence on steep slopes and small streams.
