REGIONAL SUMMARY:
For the second week of 2025, the ASEAN region experience 43 significant disasters, including floods, landslides, and storms. Indonesia, Malaysia, and the Philippines were affected by these disasters. The Badan Nasional Penanggulangan Bencana (BNPB) of Indonesia reported flooding, landslides, and storm events in Riau, North Sumatra, East Nusa Tenggara, East Java, West Java, Central Java, Aceh, West Nusa Tenggara, South Sumatra, Gorontalo, Banten, Lampung, and North Maluku. In Malaysia, the Agensi Pengurusan Bencana Negara (NADMA) reported flooding in Johor, Perak, Terengganu, and Sarawak. Finally, in the Philippines, the National Disaster Risk Reduction and Management Council (NDRRMC) reported storms, floods, and landslides in Region 12, Region 10, Bicol Region, and Region 6.
HIGHLIGHT:
In the Philippines, the effects of the Shear Line brought storms, floods, and landslides in several regions in Southern Luzon, Visayas, and Mindanao as reported by the NDRRMC. Heavy rainfall in the Bicol region resulted to flooding which claimed one life, displaced 5K individuals, and affected 78.8K people. In addition, 42 roads were also inundated by the widespread flooding. In Region 6, the Shear Line caused flooding and storms that affected 8.3K individuals (2.8K families), damaged 41 houses (seven were totally damaged). In Mindanao, 6.6K people (1.5K families) were affected and 98 persons were displaced by flooding in Region 12, while 260 individuals were affected by storms, floods, and landslides in Region 10. Authorities immediately mobilized resources to provide support to the affected communities and address the situation.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) indicates a 7-day average rainfall ranging from medium to high across Brunei Darussalam, Indonesia, Malaysia, Philippines (Visayas and Mindanao), and Singapore. As of this reporting, there is no active tropical cyclone being monitored in the ASEAN region (JTWC).
GEOPHYSICAL:
One (1) significant earthquake (M>5.0) were recorded by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG). Mount Semeru (alert level II), Lewotobi Laki-laki (alert level III), Marapi (level II), and Ibu (alert level III) in Indonesia, and Mayon Volcano (alert level 1), Taal (alert level 1), and Kanlaon (alert level 3) in the Philippines reported recent volcanic activity according to the Pusat Vulkanologi dan Mitigasi Bencana Geologi PVMBG and Philippine Institute of Volcanology and Seismology (PHIVOLCS).
OUTLOOK:
According to the ASEAN Specialised Meteorological Centre (ASMC), for the coming week, wetter conditions are predicted over much of the central and western Maritime Continent. Cooler conditions may persist over Mainland Southeast Asia. There is a small increase in chance of very heavy rainfall over the Malay Peninsula and parts of the equatorial region, including central and northern Sumatra, Sulawesi and the Maluku Islands. La Niña-like conditions predicted for January (most models predict these conditions not to persist long enough to declare a La Niña event).
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Malaysia: NADMA
Philippines: NDRRMC, PHIVOLCS;
Various news agencies.
