According to Nguyen Van Huong, Head of the Weather Forecast Division under the National Center for Hydro-Meteorological Forecasting (NCHMF), the storm weakened faster than initially expected due to strong, dry cold air from the north. As a result, rainfall from its circulation was lower than forecast. However, following its dissipation, easterly disturbances combined with cold air and mountainous terrain are expected to trigger heavy and prolonged downpours, with rainfall intensifying from the evening of October 23.

Moderate to heavy rain has already been recorded from Ha Tinh to Da Nang provinces, with some areas experiencing very heavy rainfall. Between 7 p.m. on October 22 and 8 a.m. on October 23, total rainfall reached 80–150 mm at several stations, including Ho Mac Khe in Ha Tinh (149.6 mm), Truong Xuan in Quang Tri (89.2 mm), and Bach Ma National Park in Thua Thien Hue (108 mm).

From the evening of October 23 to October 28, flood levels are expected to rise on rivers from central Quang Tri to Quang Ngai provinces. Peak water levels on the Kien Giang, Thach Han, Bo, and Huong rivers may reach alarm levels 2–3, while the Gianh, Vu Gia-Thu Bon, Tra Khuc, and Ve rivers could exceed alarm level 1-2. The disaster risk level for the flooding event is assessed at level 2.

Authorities have warned of high risks of widespread flooding in low-lying areas, flash floods on small rivers and streams, and landslides in mountainous regions. Residents are urged not to let their guard down and to closely follow official weather updates from the The Vietnam Meteorological Hydrological Administration (VMHA), the National Center for Hydro-Meteorological Forecasting (nchmf.gov.vn), local meteorological stations, and national and provincial media outlets.

Huong emphasized that all forecasts issued by the VMHA are based on verified observation data, modeling systems, and technical procedures in line with the standards of the World Meteorological Organization (WMO).

The agency is also open to collaboration and data sharing with domestic and international scientists to deliver faster, more accurate warnings, helping communities stay prepared and minimize losses from natural disasters.

Widespread flooding expected across Central Vietnam as Fengshen nears

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