On July 21, 2026, the water levels in various hydroelectric reservoirs across Vietnam were reported to be below normal. The Hoa Binh reservoir, one of the most significant in the country, recorded a water level of 102.95 meters, which is 14.05 meters lower than the usual level.

According to the latest data updated at 7 PM on July 21, the inflow to the Hoa Binh reservoir was measured at 3,954 cubic meters per second, while the total outflow reached 4,446 cubic meters per second. This outflow included 1,526 cubic meters per second released through the spillway and 2,920 cubic meters per second through the power plant.

In the Northwest region, the Lai Chau reservoir recorded a water level of 285.67 meters, which is 9.33 meters lower than normal. Other reservoirs in the area, such as Bản Chát and Huội Quảng, were also below their standard levels. For instance, the Bản Chát reservoir was at 469.71 meters, 5.29 meters lower than usual, while the Huội Quảng reservoir was at 369.63 meters, just 0.37 meters below the standard level.

In the North Central region, the Trung Sơn reservoir was at 150.12 meters, only 0.12 meters above the dead level, while the Bản Vẽ and Khe Bố reservoirs recorded levels of 173.48 meters and 64.2 meters, respectively. The Quảng Trị reservoir was at 459.86 meters.

Moving to the South Central region, the A Vương reservoir was at 352.69 meters, with various other reservoirs like Sông Bung 2 and Vĩnh Sơn A also showing significantly lower levels than normal.

In the Central Highlands, the Ialy reservoir recorded a level of 501.1 meters, which is 13.9 meters below normal, while other reservoirs in the area showed similar trends of low water levels.

In the Southeast region, the Trị An reservoir was at 51.44 meters, which is 10.56 meters lower than the standard level. The inflow to this reservoir was 380 cubic meters per second, with a total outflow of 552 cubic meters per second, all through the power plant.

Overall, many hydroelectric reservoirs across Vietnam are experiencing lower than normal water levels, which could have implications for power generation and water supply in the coming months.