The centre reported that the storm has continued to change its moving direction, causing strong winds and high waves in the northern part of the East Sea, seriously affecting vessels operating in this area.

According to the centre, at 4am on October 21, the centre of Fengshen, the 12th storm in the East Sea this year, was located at approximately 18.3 degrees North and 113.0 degrees East, about 200 km north-northeast of Vietnam’s Hoang Sa special zone. The storm maintains strong winds at Levels 9–10 (75–102 km per hour), gusting up to Level 12, moving westward at 20 km per hour.

By 4am on October 22, it will be over the northwestern waters near Hoang Sa with similar wind strength, moving west-southwest at 10–15 km per hour. This will affect the northwest of the East Sea, including Hoang Sa, with a Level-3 disaster risk.

By 4am on October 23, the storm is forecast to reach inshore areas from the central city of Hue to Quang Ngai province with weakened winds at Level 6, and possibly abate into a tropical depression. This will cover waters from the south of Quang Tri to Quang Ngai (including Ly Son special zone), with the continued Level-3 risk.

By 4am on October 24, Fengshen will weaken further into a low-pressure area over southern Laos, moving southwest.

The northern East Sea, including Hoang Sa, faces strong winds at Levels 7–8 which will intensify near the storm’s centre to Levels 9–10, with gusts at Level 12. Waves will reach 3–7 metres, causing very rough seas. The sea area from southern Quang Tri to Quang Ngai will see winds at Levels 6–8, with waves 3–5 metres high.

All vessels in these regions may encounter strong winds, whirlwinds, and high waves, requiring strict safety measures.

From October 21, scattered showers and thunderstorms are forecasted from Quang Tri to Da Nang, eastern areas from Quang Ngai to Khanh Hoa, and southern Vietnam, with heavy rain exceeding 80 mm and rainfall rates possibly over 60 mm per three hours in certain places.

From October 22 to 26, heavy to very heavy rains are expected from Ha Tinh to Quang Ngai. Total rainfall may reach 500–700 mm in the southern part of Quang Tri to Da Nang, even over 900 mm in some areas, and 200–400 mm in Ha Tinh, the north of Quang Tri, and Quang Ngai, possibly more than 500 mm in several areas.

There is a high risk of intense rain of over 200 mm per three hours, the centre noted, warning about potential whirlwinds, lightning, hail, and strong gusts. Heavy rains may last until the end of October, with disaster risk at Level 1 generally and Level 2 from southern Quang Tri to Da Nang.

Flooding in low-lying, urban, and industrial areas, flash floods on small rivers, and landslides on slopes are possible. Real-time warnings are available at https://luquetsatlo.nchmf.gov.vn./.VNA