As of 9:00 a.m. on December 3, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.82m; water flow to the lake reached 1,770m3/s; total discharge was 1,763m3/s.
Implementing the inter-reservoir operation process in the Red River basin, Hoa Binh Hydropower Plant closed the bottom spillway at 9:00 p.m. on November 24, 2025. After closing the spillway, the water flow downstream decreased rapidly.
At Tuyen Quang Lake, by 9:00 a.m. on December 3, the upstream water level reached 119.02 m; the water flow to the lake reached 118 m3/s; the total discharge was 114.62 m3/s.
Implementing the inter-reservoir operation process on the Red River basin, Tuyen Quang Hydropower Plant has closed 1 bottom spillway gate of Tuyen Quang Hydropower Plant, currently only maintaining power generation through generators.
As of 9:00 a.m. on December 3, Son La Lake recorded upstream water levels at 214.57 m; water flow to the lake was 864 m3/s; total discharge was 1,420 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 293.88m; the water flow to the lake reached 693m3/s; the total discharge was 1,103m3/s. Currently, Lai Chau Hydropower Plant has also closed all spillways and surface spillways, only operating power generation through generators.
At Thac Ba Lake, as of 9:00 a.m. on December 3, the upstream water level reached 57.79 m; the water flow to the lake reached 156 m3/s; the total discharge was 272.27 m3/s. Currently, Thac Ba Hydropower Plant also maintains the closure of all spillways and surface spillways.
Up to this point, all large hydroelectric reservoirs in the North have simultaneously closed to release water, showing that the water source situation has stabilized, creating conditions to ensure safety downstream and maintain stable power production.
According to the latest weather forecast from the National Center for Hydro-Meteorological Forecasting, today, December 3, a part of cold air is continuing to move south.
Early this morning and morning, cold air will affect the Northeast; then spread to the North Central, Northwest and North Central regions. The Northeast wind on land is strong at level 2-3, coastal areas at level 3-4.
From tonight, the North and North Central regions will be cold; some mountainous areas will be very cold.
The lowest temperature in the North is from 14-17 degrees Celsius; mountainous areas 13-15 degrees Celsius, some places below 12 degrees Celsius. The lowest in the North Central region is 15-18 degrees Celsius.
The Hanoi area from tonight will be cold, the temperature will be 15-18 degrees Celsius.
The areas of Hue, Da Nang, the East of Quang Ngai to Dak Lak and Khanh Hoa will have moderate rain, heavy rain, rainfall of 40-100mm, locally over 150mm.
On the night of December 3, the area from Quang Tri to Da Nang and the East of Quang Ngai will have moderate rain, heavy rain, rainfall of 40-80mm, locally over 150mm. Risk of rainfall greater than 100mm/3 hours.
Heavy rain can cause flooding in low-lying areas, flash floods in small rivers and streams, and landslides.
