REGIONAL SUMMARY:
During the forty-seventh week of 2025, a total of 37 disaster events were reported across the ASEAN region, including floods, landslides, storms, wind-related incidents, and volcanic activity, affecting Indonesia, Malaysia, the Philippines, and Thailand. Additionally, in Viet Nam, landslides and flooding that began in Week 46 across central regions continued to be reported by Viet Nam Disaster and Dyke Management Authority (VDDMA). In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) recorded multiple events across several provinces, including Aceh, Banten, West Java, Central Java, East Java, Lampung, West Nusa Tenggara, Southeast Sulawesi, West Sumatra, and North Sumatra. In Malaysia, Agensi Pengurusan Bencana Negara (NADMA) documented flooding and storm-related disasters in Kelantan, Perlis, Perak, Kedah, Pulau Pinang, Terengganu, and Selangor. Meanwhile, in the Philippines, National Disaster Risk Reduction and Management Council (NDRRMC) reported flooding and landslides in Regions II, CAR, and BARMM. Lastly, Department of Disaster Prevention and Mitigation (DDPM) also reported flooding across several provinces in the southern region of Thailand.
HIGHLIGHT:
Since Week 46 of 2025, Viet Nam has experienced intense rainfall resulting in severe flooding and landslides. As of 24 Nov, VDDMA reported a total of 102 people dead or missing, comprising 91 fatalities (Quang Tri, Hue, Da Nang, Gia Lai, Dak Lak, Khanh Hoa) and 11 missing persons (Da Nang, Dak Lak, Khanh Hoa). Reported damages include 221 collapsed houses, 933 damaged houses, and 200,992 houses inundated. Agricultural impacts are significant, with 82,147 hectares of rice and seasonal crops damaged, 117,067 hectares of perennial crops affected, 3,339,352 livestock and poultry dead or swept away, and 1,157 hectares of aquaculture impacted. 15 locations along National Highways remain partially obstructed by landslides, while 15 railway points in the Dong Tac–Phu Hiep and Phu Hiep–Hao Son sections are still under repair due to water discharge from the Ba Ha hydropower plant. Initial economic losses are estimated at 13,078 billion VND (approximately USD 496 million). Relevant authorities and national ministries continue search operations for missing persons, provide support to affected families, assist with debris clearance, environmental sanitation, traffic management, repair of damaged transport routes, and the gradual restoration of livelihoods in areas where floodwaters have receded. On 23 Nov 2025, the Prime Minister issued Official Telegram No. 227/CD-TTg, directing ministries and local authorities to focus on addressing the consequences of the floods, restoring production and business activities, and stabilising the lives of affected communities in the Central Region. The AHA Centre continues to closely monitor the situation in coordination with VDDMA and remains ready to provide assistance should the need arise.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) indicated medium to high 7-day average rainfall across most ASEAN countries. As of 24 Nov at 1600H, INVEST 92W (Tropical Depression “Verbena” in the Philippines) was located near Jabonga, Agusan del Norte, and is forecast to track across CARAGA, the Visayas, and northern Palawan before emerging over the West Philippine Sea on 26 November, where it may peak as a severe tropical storm (PAGASA). Tropical Disturbance INVEST 95B, about 237 km northeast of Kuala Lumpur, is also being monitored, though it currently shows low potential for further development (BMKG, JTWC). Both systems are expected to affects weather conditions in Indonesia, Peninsular Malaysia, southern Thailand, and the Philippines.
GEOPHYSICAL:
Five (5) significant earthquakes (M>5.0) were recorded by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG), Myanmar’s Department of Meteorology and Hydrology (DMH), and Thai Meteorological Department (TMD). Mount Semeru (alert level IV) and Ibu (alert level II) in Indonesia, and Kanlaon (alert level 2), Taal (alert level 1), Mayon (alert level 1), and Bulusan (alert level 1) volcanoes in the Philippines reported recent volcanic activity according to Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) and the Philippines Institute of Volcanology and Seismology (PHIVOLCS).
OUTLOOK:
According to the ASEAN Specialised Meteorological Centre (ASMC), for the coming week, drier conditions are predicted over much of Mainland Southeast Asia; wetter conditions are predicted over parts of the western Maritime Continent; and cooler than usual temperatures are predicted over much of Mainland Southeast Asia. For the regional assessment of extremes, there is a small increase in chance of very heavy rainfall conditions to occurs over parts of Peninsular Malaysia, northern Sumatra, eastern Borneo and northern Philippines; and there is a small increase in chance of extreme hot conditions to occurs over parts of the central and eastern equatorial region. A negative IOD is currently present. La Niña conditions are present and are predicted until January – February 2026. The typical impact of La Niña on Southeast Asia is wetter-than-average rainfall conditions, including for much of the Maritime Continent during December to February.
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Disaster Information Network (ADINet); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Malaysia: NADMA;
Myanmar: DMH;
Philippines: NDRRMC, PAGASA, PHIVOLCS;
Thailand: DDPM, TMD;
Viet Nam: VDDMA;
Various news agencies.
