Many areas are facing heavy rains (Photo by Hai Long)
The National Centre for Hydro-Meteorological Forecasting reported that a low-pressure system formed over the central East Sea on August 15 and may strengthen into a tropical depression within one to two days.
On August 16, heavy rain and thunderstorms are expected in the northeast, Lao Cai, Thanh Hoa and Nghe An, with rainfall ranging from 60 to 130mm, and some places exceeding 300mm.
The Central Highlands and southern provinces are also forecast to experience downpours of 50 to 100mm, with localised totals above 200mm.
Between the nights of August 17 and 18, torrential rain and thunderstorms are predicted for the northeast and provinces from Thanh Hoa to Quang Tri, with 40 to 90mm of rainfall and some areas possibly reaching 200mm.