On the afternoon of July 27, Pham Thi Cham, a forecaster at the National Center for Hydro-Meteorological Forecasting, provided an update on the widespread heavy rain that has begun affecting the country.

From the afternoon of July 27 through the night of July 28, widespread moderate to heavy rain is forecast across northern Vietnam. Notably, the entire mountainous and midland region, including Cao Bang Province and western Lang Son Province, is expected to receive moderate to heavy rain, with widespread totals of 70-120mm. Some areas could see exceptionally heavy rainfall exceeding 250mm.

Pham Thi Cham particularly warned that mountainous northern provinces have experienced repeated thunderstorms and rain in recent days, leaving the soil and rock increasingly unstable. With further bouts of intense rain expected, the risk of flash floods and landslides is very high. Residents in these areas should remain vigilant and be prepared to take appropriate precautions.

Other parts of northern Vietnam are also forecast to experience widespread rain and thunderstorms, with rainfall of 50-100mm and localized totals exceeding 150mm.

Central Highlands and southern Vietnam to see prolonged rain through July 29

At the same time, the Central Highlands and southern Vietnam are also entering a period of widespread rain and thunderstorms, beginning on the evening of July 27 and expected to last through July 29.

Total rainfall during this period is forecast at 40-100mm, with some locations receiving exceptionally heavy rain of more than 200mm.

The weather agency warned that during widespread thunderstorms, people across the country should take precautions against accompanying extreme weather, including tornadoes, lightning, hail and strong wind gusts that could threaten lives and property.

Detailed outlook for the nationwide heavy rain

On July 27, northern Vietnam experienced showers, moderate rain and thunderstorms, with heavy rain in some locations. Between 7 a.m. and 3 p.m. that day, rainfall exceeded 80mm in several places, including Ho Song Ran in Quang Ninh at 109.8mm, Truc Tay in Bac Ninh at 93.6mm, Cam Giang in Thai Nguyen at 91.2mm and Phu Duc in Hung Yen at 89mm.

From the afternoon of July 27 through the night of July 28, widespread moderate to heavy rain and thunderstorms are forecast across northern Vietnam, with rainfall generally ranging from 50-120mm and exceeding 250mm in some locations.

From the evening of July 27 through July 29, the Central Highlands and southern Vietnam are forecast to experience moderate to heavy rain and thunderstorms, with widespread rainfall of 40-100mm and localized totals exceeding 200mm.

The weather agency warned that extremely intense rainfall could occur, with more than 100mm falling within three hours.

In addition, during the evening and night of July 27, Thanh Hoa, Nghe An, Hue and the south-central coastal region are forecast to see scattered showers and thunderstorms, with rainfall generally ranging from 10-30mm and exceeding 60mm in some locations.

Heavy rain in northern Vietnam is expected to gradually ease from July 29.

On the night of July 29, the Central Highlands and southern Vietnam will continue to experience moderate to heavy rain and thunderstorms, with rainfall of 20-40mm and localized totals exceeding 70mm. Heavy rain in these regions is expected to gradually ease from July 30.

Bao Anh