In just six hours, Thai Nguyen recorded a staggering 345.7mm of rainfall, with several mountainous regions also receiving over 100mm. With more rain forecasted, warnings have been issued for flash floods and landslides across 14 northern provinces.

According to the National Center for Hydro-Meteorological Forecasting, between 1:00 and 7:00 a.m. on June 21, the northern region experienced intense rainfall. Notable figures include: Phuc Trieu (Thai Nguyen) 345.7mm; Tien Nguyen 1 (Ha Giang) 176.2mm; Bang Luan (Phu Tho) 151.6mm; Ho Ngoi La (Tuyen Quang) 134.2mm; Van Mai (Hoa Binh) 128.8mm; Hong An (Cao Bang) 106.6mm; Yen Han (Bac Kan) 89.8mm; Km46 (Son La) 83mm; Nam Det (Lao Cai) 81.8mm; Nam Khao 2 (Lai Chau) 77.8mm; Tan Hoa (Lang Son) 76.2mm.

From midday today until the night of June 22, the northern mountainous and midland areas are expected to continue experiencing moderate to heavy rain and thunderstorms. Some areas could see rainfall exceeding 250mm, with Thai Nguyen forecasted to receive between 60-90mm in the next six hours (from 8:00 a.m.), and potentially over 120mm in certain areas.

Risk alerts have been issued for intense localized rainfall exceeding 100mm within three hours.

Additionally, today and tonight, the northern delta and Thanh Hoa are expected to see scattered showers and thunderstorms. Some locations may receive 10-30mm of rain, and locally over 50mm.

The Central Highlands and southern Vietnam will also face rainfall, with the southern part of the Central Highlands and the South receiving 20-40mm, and isolated areas over 80mm. Northern parts of the Central Highlands may see 10-30mm, with some locations exceeding 60mm. Rainfall will mainly occur in the afternoon and evening.

Nguyen Van Huong, Head of the Weather Forecasting Department at the National Center for Hydro-Meteorological Forecasting, noted that since early June, the northern mountainous and midland areas have experienced persistent widespread rainfall, significantly above the annual average.

"The combination of prolonged rain and intense downpours significantly increases the risk of flash floods and landslides, especially in the northern mountainous and midland areas over the weekend," he stated.

Over the next six hours (from 8:00 a.m.), the risk of flash floods in small rivers and streams, and landslides on steep slopes, remains high across several districts in 14 northern provinces.

Bao Anh