According to the National Center for Hydro-Meteorological Forecasting, last night and the morning of September 10, in the Viet Bac region, the Northern Delta, Quang Ninh, and Thanh Hoa, there was heavy to very heavy rain.
Rainfall from 7pm on September 9 to 8am on September 10 was over 200mm in some places such as: Yen Ninh (Yen Bai) 370mm, Dong Tam (Hoa Binh) 292.8mm, My Duc (Hanoi) 273.8mm, Nam Dinh City 271mm, Tan Hoa (Thai Binh) 215.2mm...

Weather forecast for the day and night of September 10, mountainous areas and midlands of the North will have moderate rain, heavy rain, some places will have very heavy rain and thunderstorms with common rainfall of 40-80mm, locally over 150mm; Lao Cai and Yen Bai will have heavy to very heavy rain with common rainfall of 50-120mm, locally over 250mm.
The Northern Delta, Hoa Binh, Thanh Hoa and Nghe An regions have heavy to very heavy rain and scattered thunderstorms with common rainfall of 50-120mm, locally over 300mm.
During the day and night of September 11, the mountainous and midland areas of the North will have moderate rain, heavy rain, and in some places very heavy rain and thunderstorms with rainfall ranging from 30-60mm, locally over 120mm. The Northern Delta, Hoa Binh, Thanh Hoa and Nghe An will have similar weather, with rainfall ranging from 40-90mm, locally over 200mm.
During the day and night of September 10, the area from Ha Tinh to Thua Thien Hue will have scattered showers and thunderstorms, locally heavy rain with rainfall from 15-30mm, locally over 70mm.
In the late afternoon and evening of September 10, in the area from Da Nang to Khanh Hoa, the Central Highlands and the South, there will be scattered showers and thunderstorms, locally heavy rain with rainfall from 10-30mm, locally over 60mm. During thunderstorms, there is a possibility of tornadoes, lightning and strong gusts of wind.
In the Gulf of Tonkin, the sea area from Quang Tri to Quang Ngai, the South East Sea (including the sea area of Truong Sa archipelago) during the day and night of September 10, there will be showers and thunderstorms. During the thunderstorms, there is a possibility of tornadoes and strong gusts of wind of level 7-8, beware of wave heights sometimes increasing to over 2.0m. All vessels operating in these areas are at high risk of being affected by tornadoes and strong gusts of wind.
Warning day and night 12.9 in the Southern region of the Northern Delta and North Central region there will be moderate rain, heavy rain, some places very heavy rain and thunderstorms with common rainfall of 20-60mm, some places over 100mm. Warning level 1 natural disaster risk due to heavy rain, tornadoes, lightning.
Heavy rain and localized heavy rains are likely to cause flooding in low-lying areas; flash floods in small rivers and streams, and landslides on steep slopes. Tourists planning to visit the Northern and North Central provinces during this time should pay attention to weather conditions and follow local recommendations to ensure safety.