Thai Nguyen and Hanoi are two places with especially heavy rain.

From this afternoon to this evening (October 7), the North will still have moderate to heavy rain with rainfall in Tuyen Quang, Thai Nguyen, and Hanoi around 30-60mm, locally over 100mm. On the evening of October 7, the rain will decrease, but by early morning, the Northeast region may have rain and moderate rain again.

At noon on October 7, according to the National Center for Hydro-Meteorological Forecasting, the Department of Hydro-Meteorology ( Ministry of Agriculture and Environment ) informed about heavy rain in the northern provinces and the capital Hanoi from October 6-7.

Accordingly, under the influence of the circulation of storm No. 11, from the morning of October 6, there has been moderate to heavy rain over a wide area in the Northern region; from early morning and the morning of October 7, due to the influence of the circulation of the weakened low pressure area from storm No. 11 with the center of the low pressure area located in the western region of the Northern region, combined with the Southeast wind zone of the subtropical high pressure tongue strongly encroaching from the East, creating a convergence zone of meridional winds in the northeastern region, running along the provinces of Tuyen Quang, Cao Bang, Thai Nguyen, Phu Tho, Hanoi , Lang Son, Bac Ninh, in which Thai Nguyen and Hanoi are the two provinces and cities with especially heavy rain.

In Thai Nguyen, the rainfall from 7pm on October 6 to 9am on October 7 was over 450mm in some places, such as Hoa Thuong station (Thai Nguyen) 526mm, Cay Thi station (Thai Nguyen) 462mm. In other localities, there were places over 200mm, such as Bo Ha station ( Bac Ninh ) 348mm, Me Tri station (Hanoi) 261.6mm, Soc Son station (Hanoi) 242.4mm, Tan Tri 1 station (Lang Son) 224.4mm, Chuc Bai Son station (Quang Ninh) 216mm...

By noon on October 7, Hanoi had more than 100 flooded spots due to heavy rain.

The next forecast, because the current meridional wind convergence is showing signs of weakening, so this afternoon in the North there will still be moderate to heavy rain with rainfall in Tuyen Quang, Thai Nguyen, Hanoi around 30-60mm, locally over 100m. Other places will have rain from 20-30mm. On the evening of October 7, the rain will decrease but by early morning the Northeast region may have rain and moderate rain again.

Due to the impact of heavy rain from today (October 7) to October 10, floods on rivers in the Northern region and Thanh Hoa continue to rise. During this flood, the flood peak on rivers in Cao Bang, Lang Son, Quang Ninh provinces, Luc Nam River (Bac Ninh), Thai Binh River (Hai Phong) will rise to level BĐ2-BĐ3 and above BĐ3; the flood peak on Thao River (Lao Cai), Lo River (Tuyen Quang), Hoang Long River (Ninh Binh), and the upper Ma River (Thanh Hoa) will rise to level BĐ1-BĐ2, with some rivers above BĐ2; the flood peak reaching Hoa Binh Lake and the lower Red River at Hanoi station is likely to be above BĐ1.

Widespread flooding in Thai Nguyen, Bac Ninh, Lang Son, Cao Bang provinces and risk of flooding in low-lying areas along rivers, urban areas in the Northern region and Thanh Hoa; risk of landslides on river banks, river dykes, risk of flash floods on rivers and streams and landslides on steep slopes in mountainous areas of the Northern region and Thanh Hoa.

Comparing the two heavy rains in Hanoi (October 29-30, 2025 and October 6-7, 2025), the Department of Hydrometeorology said that the common point is the shape that causes heavy rain: Convergence of meridional winds of the post-storm circulation and the humid Southeast wind zone of the subtropical high pressure. The heavy rain areas are concentrated in the Northern region, focusing on the Northeast region, including the capital Hanoi.

The difference is in the timing of the rain. The rain on September 30th started in the early morning and lasted until the afternoon; the rain on October 7th mainly occurred in the early morning and morning.

Rain intensity: The largest 1-hour rainfall of the September 30 rain period measured at Dinh Cong station (Hanoi) from 11am to 12am was 101.4mm; the largest 1-hour rainfall of the October 7 rain period at Me Tri from 5am to 6am was 108.2mm. The September 30 rain period caused more widespread flooding than the October 7 rain period.

Heavy rain areas: On September 30, the heaviest rain was concentrated in the inner city and northern part of Hanoi, with average rainfall of 200 - 300mm/24 hours; in the western and southwestern areas (Ba Vi, Xuan Mai, Chuong My, Son Tay), average rainfall was 60 - 90mm.

As for the rain on October 7: The heaviest rain was also concentrated in the inner city of Hanoi, including Me Tri, Lang, Cau Dien, Ha Dong, Phu Lam, Dong Anh areas. Ba Vi, Xuan Mai, Chuong My, Son Tay areas had light rain. The number of places with rain over 100mm on September 30 was higher than on October 7.

Source: https://cand.com.vn/Xa-hoi/thai-nguyen-va-ha-noi-la-2-noi-co-mua-dac-biet-lon--i783821/