According to the National Center for Hydro-Meteorological Forecasting, last night and early this morning (May 18), the Northern region, Thanh Hoa and Nghe An had showers and thunderstorms, with some places having heavy rain.
In particular, the mountainous areas of the Northeast will have moderate rain, heavy rain, and some places will have very heavy rain.
Rainfall from 7pm on May 17 to 3am on May 18 was over 150mm in some places such as Tan Lap (Ha Giang) 167.2mm, Na Hang (Tuyen Quang) 232.8mm, Yen Duong (Bac Kan) 214.4mm...
In the afternoon and night of May 18, the Northern region, Thanh Hoa and Nghe An will have moderate rain, heavy rain and thunderstorms, locally very heavy rain with common rainfall from 30 - 70mm, locally over 100mm. Heavy rain will be concentrated from late afternoon to night.
The meteorological agency warns of the risk of local heavy rain (rainfall greater than 80mm within 3 hours).
From May 19, heavy rain in the above areas will gradually decrease.
The National Center for Hydro-Meteorological Forecasting warns that the natural disaster risk level due to heavy rain is level 1. During thunderstorms, there is a possibility of tornadoes, lightning, hail and strong gusts of wind.
Heavy rain is likely to cause flooding in low-lying areas, urban and industrial areas; flash floods on small rivers and streams, landslides on steep slopes.