REGIONAL SUMMARY:
During the twenty-fifth week of 2025, the ASEAN region experienced a total of 19 disaster events, including floods, landslides, storms, and wind-related incidents. These affected several Member States, specifically Indonesia, Malaysia, the Philippines, Thailand, and Viet Nam. In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) reported the impacts of floods and landslides in Central Sulawesi, Banten, Central Java, West Kalimantan, Southwest Papua, Gorontalo, and North Maluku. In Malaysia, the Agensi Pengurusan Bencana Negara (NADMA) documented flooding in Selangor. In the Philippines, the National Disaster Risk Reduction and Management Council (NDRRMC) recorded flooding in Cotabato and Maguindanao Del Norte. Meanwhile, in Thailand, the Department of Disaster Prevention and Mitigation (DDPM) reported the impacts of storms with strong winds in Nong Kai. Finally, the Viet Nam Disaster and Dyke Management Authority (VDDMA) reported floods, landslides, storms, and strong winds in Ha Giang, Lao Cai, Yen Bai, Phu Tho, Bac Kan, Tuyen Quang, Thai Nguyen, Lang Son and Bac Giang in the Northern Region.
HIGHLIGHT:
In Indonesia, high intensity rain in South Halmahera Regency in North Maluku Province caused flooding that inundated 15 villages as reported by the BNPB. The flood’s current swept away one toddler while another person suffered injuries from electric shock. According to the report, about 14K people (4.2K families) were evacuated by authorities to ensure their safety from the flooding. About 1,522 houses were affected, four houses were severely damaged, and three were slightly damaged. The floods also severely damaged two bridges while another bridge sustained partial damage. Authorities continue to coordinate with relevant parties and conduct assessments and emergency response operations to support the affected communities.
Additionally, updated impact information on the M7.7 Mandalay Earthquake in Myanmar, based on DDM Myanmar report as of 21 June at 18:30 hrs UTC+7, recorded a total of 3,757 fatalities, 49 individuals missing, and 5,104 injured. Approximately 506,093 people (162,171 families) have been affected, with 281,704 people internally displaced. A total of 100 evacuation centres continue to serve displaced communities. Reported damages include 11,995 totally damaged houses and 40,019 partially damaged houses, 2,596 schools, 713 hospitals, 14,367 religious buildings and pagodas, as well as 9,970 offices and other buildings. The estimated economic losses are approximately USD 1.6 billion. Data collection and validation are ongoing.
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 (Sumatra, Java, Kalimantan, Sulawesi, Maluku, and Papua), Lao PDR, Malaysia, Myanmar, the Philippines, Singapore, Thailand, and Viet Nam. As of 23 June 2025 at 1900 hrs UTC+7, a low pressure area, INVEST 96W, is being monitored over the waters west of the Batangas in the Philippines. According to PAGASA, the potential for development into a tropical cyclone within 24 hours is low (PAGASA).
GEOPHYSICAL:
Three (3) significant earthquakes (M>5.0) were recorded by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) and the Philippine Institute of Volcanology and Seismology (PHIVOLCS). Mount Ibu (alert level II), Dukono (alert level II), Raung (alert level II), Semeru (alert level II), Marapi (alert level II), Ili Lewotolok (alert level II), and Lewotobi Laki-Laki (alert level IV) 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 PHIVOLCS.
OUTLOOK:
According to the ASEAN Specialised Meteorological Centre (ASMC), for the coming week, drier conditions are predicted over much of the western and central Maritime Continent and warmer than usual temperatures are predicted over most of the Maritime Continent. For the regional assessment of extremes, there is a small increase in chance of very heavy rainfall is predicted over southern Sulawesi while a moderate increase in chance of extreme hot conditions is predicted over parts of the western Maritime Continent, in particular over central and southern Sumatra, and western parts of the Malay Peninsula. 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;
Malaysia: NADMA;
Philippines: NDRRMC, PHIVOLCS;
Thailand: DDPM, TMD;
Viet Nam: VDDMA;
Various news agencies.
