As of 8:00 a.m. on October 30, 2025, according to an update from Vietnam Electricity Group, Hoa Binh Lake recorded upstream water levels at elevation of 116.72m; water flow to the lake reached 554m3/s; total discharge was 1,403m3/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 30, the upstream water level reached 119.14 m; the water flow to the lake reached 379 m3/s; the total discharge was 185.68 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 30, Son La Lake had an upstream water level of 214.94 m; water flow to the lake was 287 m3/s; total discharge was 1,676 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 294.27m; the water flow to the lake reached 803m3/s; the total discharge was 1,108m3/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 30, the upstream water level reached 58.04 m; the water flow to the lake reached 293 m3/s, the total discharge was 270.61 m3/s. Currently, Thac Ba Hydropower Plant maintains all floodgates closed.
Up to this point, all large hydroelectric reservoirs in the North have simultaneously closed, showing that the water source situation has stabilized, creating conditions to ensure safety downstream and maintain stable power production.
According to the National Center for Hydro-Meteorological Forecasting, around the evening and night of October 30, cold air began to affect the Northeast, then spread to the North Central, Northwest and Central Central regions.
Northeast wind level 2-3, coastal areas level 3-4.
From October 30 to November 1, due to combined with the East wind disturbance, the Northeast region will have scattered rain.
Due to the influence of high-altitude easterly wind disturbances, combined with increased cold air, the area from Thanh Hoa to North Quang Tri is likely to have moderate rain, heavy rain, locally very heavy rain and thunderstorms.
Heavy rain can cause flooding in low-lying areas, flash floods, landslides; local flooding of urban areas and industrial parks.
From the night of November 1, the North and North Central regions will have cold nights and mornings, and the mountainous areas will be cold.
