REGIONAL SUMMARY:
During the twenty-eighth week of 2025, the ASEAN region experienced 26 disaster events, including droughts, floods, landslides, storms, and wind-related incidents, affecting several Member States—namely Indonesia, the Philippines, Thailand, and Viet Nam. In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) reported that several provinces were impacted, including Aceh, Banten, Gorontalo, West Java, Central Java, Riau, South Sulawesi, Central Sulawesi, and North Sumatra. In the Philippines, the National Disaster Risk Reduction and Management Council (NDRRMC) recorded flooding in Western Visayas. In Thailand, Department of Disaster Prevention and Mitigation (DDPM) reported flooding, storms, and strong winds in Mae Hong Son, Chanthaburi, Nan, Uttaradit, Phrae, Chiang Rai, Lampang, and Trat. Meanwhile, in Viet Nam, Viet Nam Disaster and Dyke Management Authority (VDDMA) reported storms, landslides, and strong winds across Tuyen Quang, Lam Dong, Cao Bang, and Lao Cai.
HIGHLIGHT:
In Indonesia, since 7 July, BNPB has reported flooding in Bekasi Regency, West Java, caused by heavy rainfall. As of 13 July at 2000 hrs utc+7, approximately 5.3K families (around 21K individuals) were affected, with around 2.4K families (9K individuals) temporarily relocated to 15 evacuation centres across 16 sub-districts (kecamatan) and 37 villages. All displaced individuals have now returned to their homes. Initial assessments indicate damage to approximately 5.3K houses and several road sections, with data collection efforts still underway. In response, local authorities, led by the BPBD Bekasi, conducted evacuations, distributed essential relief supplies, established public kitchens, and implemented other emergency response measures. Concurrently, BNPB carried out Weather Modification Operations from 7 to 10 July to mitigate further impacts. The Regent of Bekasi Regency has issued an Emergency Alert Status for Floods, Flash Floods, Extreme Weather, and Landslides, effective until August 2025. As of 13 July, floodwaters have subsided.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) indicated medium to high 7-day average rainfall across the ASEAN Region, including Brunei Darussalam, Cambodia, Indonesia, Lao PDR, Malaysia, Myanmar, the Philippines, Singapore, Thailand, and Viet Nam. Tropical Cyclone Nari and 07W are currently located over the west Pacific Ocean, outside of the ASEAN region. Additionally, two tropical disturbances (INVEST 90S and 98S) are being monitored over the Indian Ocean, with a low likelihood of development within the next 24 hours (JTWC).
GEOPHYSICAL:
Eight (8) 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 Marapi (alert level II), Semeru (alert level II), Raung (alert level II), Lewotobi Laki-laki (alert level IV), Ibu (alert level II), and Dukono (alert level II) in Indonesia, and Kanlaon (alert level 3), 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 Philippine Institute of Volcanology and Seismology (PHIVOLCS).
OUTLOOK:
According to the ASEAN Specialised Meteorological Centre (ASMC), for the coming week, drier conditions are predicted over southern Mainland Southeast Asia and parts of the northeastern Maritime Continent, and warmer than usual temperatures are predicted over most of the Maritime Continent and southern Mainland Southeast Asia. For the regional assessment of extreme weather events, there is a small increase in chance of very heavy rainfall occurring over southern Papua. Additionally, there is a moderate increase chance of extreme hot conditions to occurs over parts of southern Mainland Southeast Asia, Sumatra, and Sulawesi, as well as small increase in chances to occurs over most of Maritime Continent and southern Mainland Southeast Asia. ENSO neutral conditions are present.
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Myanmar: DDM, DMH;
Philippines: NDRRMC, PHIVOLCS;
Thailand: DDPM. TMD;
Viet Nam: VDDMA;
Various news agencies.
