OVERVIEW: Since 25 October, continuous heavy to torrential rainfall has caused widespread flooding and numerous landslides across Central Viet Nam. According to the VDDMA, between 1900H 26 October and 0700H 30 October 2025, rainfall in the Central region ranged from 150–300 mm, while the central areas experienced 500–700 mm, with some locations exceeding 1,000 mm. Exceptionally high rainfall totals were recorded at several stations, including: La To in Quang Tri (1,029 mm); Bach Ma Peak in Thua Thien Hue (3,211 mm); Khe Tre in Thua Thien Hue (1,647 mm); Phuoc Thanh in Da Nang (1,199 mm); An Long Lake in Da Nang (947 mm); Tra Thanh in Quang Ngai (1,131 mm); Tra Hiep in Quang Ngai (965 mm).
CURRENT SITUATION: According to VDDMA’s Quick Report as of 30 October 2025:
- At 0200H on 30 October, the Thu Bon River at Cau Lau Station reached a peak level of 5.62 m, surpassing the 1964 historical flood by 0.14 m. Currently, floodwaters on the Thu Bon River (Da Nang) remain high, while levels on the Huong River (Hue), Vu Gia River (Da Nang), and Tra Khuc River (Quang Ngai) are gradually receding.
- As of 0700H, 30 October 2025, water levels at key monitoring stations are as follows:
- Thu Bon River (Cau Lau): 5.51 m, 0.03 m higher than the 1964 record, slowly receding (peak 5.62m at 0200H 30 October).
- Thu Bon River (Hoi An): 3.32 m, slowly receding (peak 3.39 m at 0300H, slightly below the 1964 record).
- Vu Gia River (Ai Nghia): 9.83 m, down 0.77 m from the peak of 10.60 m at 1900H on 29 October, 0.17 m lower than the 2009 historical flood.
- Huong River (Kim Long): 3.72 m, 1.33 m below the peak of 5.05 m (2000H 27 October 2025), the highest since 2000 but lower than the 1999 flood.
- Bo River (Phu Oc): 4.43 m, and 0.82 m lower than the 5.25 m peak (1400H on 27 October 2025), now decreasing.
- Tra Bong River (Chau O): 3.67 m, 1.39 m below the 5.06 m peak (1500H on 29 October 2025), receding.
- Tra Khuc River (Tra Khuc): 5.36 m, 2.51 m below the 7.87 m peak (1500H on 29 October 2025), currently receding.
FORECAST:
According to NCHMF update as of 30 October 2025 1530H UTC+7:
- From tonight until the night of 1 November, heavy to very heavy rainfall is expected across areas from Nghe An to northern Quang Tri, with rainfall ranging from 200–400 mm, and localised areas exceeding 700 mm.
- From the night of 31 October to the night 1 November, southern Quang Tri to Hue City is forecast to experience moderate to heavy rain, with rainfall totals of 70–150 mm, and localized areas exceeding 250 mm.
- During the night of 1 November and through 2 November, heavy to very heavy rainfall is expected across areas from Nghe An to northern Quang Tri, with rainfall totals ranging from 100–200 mm, and localised areas exceeding 350 mm.
- From southern Quang Tri to Quang Ngai, moderate to heavy rain is expected, with some areas experiencing very heavy rainfall. Total rainfall is forecast to range from 50–150 mm, with localised areas exceeding 250 mm.
- Heavy rain in the Central Region is likely to last until around 4 November 2025.
HAZARDS & ANTIPICATED RISKS:
- Flash floods, urban flooding, landslides: Heavy rains may cause flooding in low-lying areas, urban areas and industrial zones; flash floods on small rivers and streams; landslides in mountainous areas.
- INVEST 98W: A low pressure area is currently being monitored about 1,830 km east of Southeastern Mindanao, Philippines. According to PAGASA’s Tropical Cyclone Threat Potential forecast, as of 30 October 2025, there is high likelihood for tropical cyclone development in the coming week. Forecasts indicate that this low pressure area may strengthen into a typhoon before making landfall over central Philippines. Long-range forecasts suggest that this potential typhoon may traverse central Philippines and track towards Central Viet Nam. (It should be noted that long-range forecasts carry a high degree of uncertainty and are subject to change).
- La Niña Watch: La Niña conditions are predicted to become established in October 2025 (ASMC).
IMPACTS: According to VDDMA’s Quick Report as of 30 October 2025, the widespread flooding in Central Viet Nam resulted in the following:
- 10 dead, 8 missing, 22 injured
- 51 houses collapsed and were swept away, 122 houses were damaged to some extent, and 128,024 houses were flooded
- About 90 communes and wards were flooded in Quang Tri, Hue City, Da Nang City, and Quang Ngai
- 4,372 ha of rice and crops were flooded and damaged
- 20 national highways were blocked due to flooding and landslides in Quang Tri, Hue City, Da Nang City, and Quang Ngai
PREPAREDNESS AND RESPONSE:
- On the evening of 28 October 2025, Deputy Prime Minister Tran Hong Ha and the Government delegation inspected and encouraged people affected by the severe flooding in Hue City.
- Prime Minister Pham Minh Chinh chaired an urgent meeting with several central localities on response and overcoming the consequences of natural disasters and floods.
- The Government and the Prime Minister have directed very early and focused on directing ministries, branches and localities to deploy timely and effective flood response work, closely following the situation.
- The Center for Conservation of Monuments of the Ancient Capital has proactively taken measures to prevent natural disasters, so up to now, there has been no damage.
- The VDDMA has coordinated the dissemination of 10.5 million warning messages of the risk of flash floods and landslides and providing safety
- instructions against rain, floods, flash floods and landslides to people in provinces from Quang Tri to Dak Lak.
- VDDMA continues to coordinate ongoing emergency response including pre-emptive evacuations which is planned to continue until 31 October.
- NCHMF continues to closely monitor the weather conditions and provides regular updates and advisories.
The AHA Centre will continue to monitor for further developments and issue necessary updates. The AHA Centre stands ready to support VDDMA Viet Nam and other Member States should the need arises.
DATA SOURCES
ASEAN Disaster Monitoring & Response System (DMRS), ASEAN Disaster Information Network (ADINet), ASEAN Specialised Meteorological Centre (ASMC);
Philippines: PAGASA;
Viet Nam: VDDMA, NCHMF;
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