According to the National Center for Hydro-Meteorological Forecasting, in the past 6 hours (from 1:00 a.m. to 7:00 a.m. on June 21), the Northern provinces have had moderate rain, heavy rain, and some places with very heavy rain such as: Phuc Tri (Thai Nguyen) 345.7mm; Tien Nguyen (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; Nam Det (Lao Cai) 81.8mm; Nam Khao (Lai Chau) 77.8mm; Tan Hoa (Lang Son) 76.2mm...
Soil moisture models show that some areas in the above provinces are nearly saturated (over 85%) or have reached a saturated state.
In the next 3 - 6 hours (from 7:40 on June 21), the above provinces will continue to have rain with common accumulated rainfall as follows: Northern mountainous and midland areas from 30 - 70mm, some places over 90mm; Northern Bang Delta region from 20 - 50mm, some places over 70mm; Thai Nguyen from 60 - 90mm, some places over 120mm.
In the next 6 hours (from 7:40 on June 21), there is a risk of flash floods on small rivers and streams, landslides on steep slopes in many districts.

The meteorological agency warns that the risk of natural disasters due to flash floods, landslides, and land subsidence due to heavy rain or water flow is level 1.
Flash floods and landslides can have a very negative impact on the environment, threatening people's lives; causing local traffic congestion, affecting the movement of vehicles; civil and economic works, causing damage to production activities and socio-economic activities.
The meteorological agency recommends that local authorities pay attention to reviewing bottlenecks and vulnerable locations in the area to take preventive and response measures.