REGIONAL SUMMARY:
During the twenty-seventh week of 2025, the ASEAN region experienced a total of 28 disaster events, including droughts, floods, landslides, storms, and wind-related disasters, affecting several Member States—specifically Indonesia, the Philippines, and Thailand. In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) the impacts of drought, floods, landslides, and strong winds in West Nusa Tenggara, Lampung, North Sumatra, Banten, West Papua, West Java, West Sulawesi, Central Sulawesi, Southeast Sulawesi, and Jakarta. In the Philippines, the National Disaster Risk Reduction and Management Council (NDRRMC) reported floods, storms, and landslides in Regions I, III, and Cordillera Administrative Region (CAR). Lastly, in Thailand, the Department of Disaster Prevention and Mitigation (DDPM) reported flooding in Chiang Rai.
HIGHLIGHT:
In the Philippines, INVEST 98W which eventually developed into Tropical Cyclone DANAS brought severe weather conditions that resulted to flooding and landslides in several regions in Luzon. The NDRRMC reported 38 flooding events, two landslides, and two incidents of fallen debris. These events affected a total of 82.5K people across Regions I, III, and CAR. Flooding also displaced more than 3K people in Region III. Reported impacts included 11 affected roads, 14 damaged houses (of which, two were totally damaged), class suspension in 219 cities and municipalities, and work suspension in 36 cities and municipalities. Authorities conducted pre-emptive evacuation in high-risk areas and provided immediate assistance to affected communities.
Additionally, updated impact information on the M7.7 Mandalay Earthquake in Myanmar, based on DDM Myanmar report as of 2 July at 18:30 hrs UTC+7, recorded a total of 3,768 fatalities, 38 individuals missing, and 5,104 injured. Approximately 281K individuals remained displaced. A total of 100 temporary shelters remain active. Estimated economic losses amounted to USD 1.6 billion. Data collection and validation are still 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, western Java, Kalimantan, Sulawesi, Maluku, and Papua), Lao PDR, Malaysia, coastal and northern to northeastern areas in Myanmar, the Philippines, Singapore, Thailand, and Viet Nam. Significantly high rainfall was observed in northern Philippines due to the combined effects of Tropical Cyclone DANAS (previously INVEST 98W) and the Southwest Monsoon. Following its landfall in Western Taiwan, TC DANAS was monitored about 680 km north of Itbayat, Batanes with a north-northeastward movement, and predicted to curve westward and make another landfall over Eastern China (PAGASA).
GEOPHYSICAL:
Five (5) significant earthquakes (M>5.0) were recorded by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG). Mount Ibu (alert level II), Dukono (alert level II), Lewotobi Laki-laki (alert level IV), Ili Lewotolok (alert level III), Raung (alert level II), Marapi (alert level II), and Semeru (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. Wetter conditions are predicted over much of northern Mainland Southeast Asia while warmer than usual temperatures are predicted over most of the Maritime Continent and southern Mainland Southeast Asia. For the regional assessment of extremes, there is a small increase in chance of very heavy rainfall over parts of western and northern Myanmar, northern Lao PDR, northern Viet Nam, and southern Papua. There is also a moderate increase in chance of extreme hot conditions over much of Sumatra, western Peninsular Malaysia, and western Papua; and a small increase in chance of extreme hot conditions predicted over the southern half of Mainland Southeast Asia, the Philippines, western and northern Borneo, Sulawesi, and the Maluku Islands. 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;
Various news agencies.
