According to the National Center for Hydro-Meteorological Forecasting, northern provinces have experienced persistent moderate to heavy rainfall over the past five days, from July 6 to 11, with accumulated precipitation generally ranging between 70 mm and 150 mm.

Rainfall totals reached between 100 mm and 200 mm in the provinces of Lai Chau, Dien Bien, Son La and Lao Cai.

Several locations recorded exceptionally heavy rainfall exceeding 300 mm, including Hua Trai in Son La Province with 511.8 mm, Muong Trai in Son La with 479.4 mm, Mong Cai in Quang Ninh Province with 469.6 mm, Quat Dong in Quang Ninh with 453 mm, and Binh Thanh in Thai Nguyen Province with 394.2 mm.

Meteorologists said northern Vietnam is expected to see widespread showers and thunderstorms from July 11 to 18, with localized areas likely to receive more than 100 mm of rain on a frequent basis.

More notably, between July 19 and 23, the Vietnam Meteorological and Hydrological Administration forecasts that northern Vietnam could come under the influence of a tropical convergence zone.

"Along this convergence zone, conditions may favor the formation of a tropical cyclone - either a tropical storm or tropical depression - which could trigger another episode of widespread heavy rainfall across the region," weather experts warned.

The National Center for Hydro-Meteorological Forecasting also noted that after several consecutive days of rainfall, soil across many northern mountainous areas has become saturated. Forecasts indicate that both localized and widespread heavy rain will continue over the coming days.

As a result, the risk of flash floods and landslides remains extremely high across northern provinces. Residents and local authorities are urged to closely monitor weather updates and proactively implement disaster preparedness and response measures to minimize potential damage.

Bao Anh