REGIONAL SUMMARY:
During the thirtieth week of 2025, the ASEAN region recorded 16 disaster events, predominantly hydrometeorological in nature—such as floods, landslides, storms, and strong winds—most of which were associated with the ongoing Southwest Monsoon and tropical cyclones affecting several Member States. These included Indonesia, Lao PDR, the Philippines, Thailand, and Viet Nam. Additionally, a magnitude 5.7 earthquake was reported in Poso, Central Sulawesi. The National Disaster Risk Reduction and Management Council (NDRRMC) of the Philippines continues to report disaster situations linked to the Southwest Monsoon and Tropical Cyclones WIPHA, FRANCISCO, and CO-MAY. In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) reported strong winds across Sulawesi, along with the aforementioned earthquake in Poso. In Lao PDR, the National Disaster Management Office (NDMO) reported the effects of the Southwest Monsoon and Tropical Cyclone WIPHA in several northern provinces. Similarly, in Thailand, the Department of Disaster Prevention and Mitigation (DDPM) noted impacts from both the monsoon and Tropical Cyclone WIPHA. In Viet Nam, the Viet Nam Disaster and Dyke Management Authority (VDDMA) reported related impacts in Nghe An, Phu Tho, Ninh Binh, and Thanh Hoa, alongside incidents of flooding, landslides, storms, and strong winds in other provinces.
HIGHLIGHT:
In the Philippines, according to NDRRMC, as of 28 July, the Combined Effects of the Southwest Monsoon and Tropical Cyclones WIPHA (Crising), FRANCISCO (Dante), CO-MAY (Emong) in the Philippines still affecting the Philippines. A total of 192 cities/municipalities have declared a state of calamity over Region 1 (11), 3 (46), NCR (8), CALABARZON (72), MIMAROPA (18), 6 (4), NIR (32), and 7 (1). According to the NDRRMC reports as of as of 28 July at 0500 HRS UTC+7, a total of 1.8M families (6.6M people) have been affected in Region 1, 2, CAR, 3, NCR, CALABARZON, MIMAROPA, 5, 6, NIR, 7, 9, 10, 11, 12, CARAGA, and BARMM with 195K persons remain internally displaced (of which, 33K families or 117K persons were served inside 1,211 evacuation centres). Reports also indicate that there have been 31 lives lost (29 of which are still for validation), 17 injured (6 of which are still for validation), and 7 missing (4 of which are still for validation). The disaster has also resulted in 15K damaged houses, 1.7K of which were totally damaged. Damages have reportedly reached 157.5M USD (houses, agriculture, livestock, poultry, fisheries, infrastructure, and other assets) and an estimated 9.5M USD worth of assistance has been provided from OCD, DSWD, LGUs, NGOs, and Others Partners.
Meanwhile, in Thailand, the DDPM has reported that the widespread flooding and caused by the Southwest Monsoon and Tropical Cyclone WIPHA over 11 provinces. These events have affected 36K households (119K persons), with 1 person dead and 1 person missing. As of 28 July at 1800 HRS UTC+7, flooding persists in 6 provinces (Nan, Chiang Rai, Phrae, Sukhotai, Tak, and Uttaradit). A total of 29 districts, 123 sub-districts with 24.5K households (79.9K persons) remain affected. Relevant government authorities have carried out necessary actions to address the situation.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) indicated high 7-day average rainfall concentrated across Lao PDR, Myanmar, the Philippines, Thailand, and Viet Nam. Tropical Cyclones CO-MAY and KROSA, currently located over the western Pacific Ocean, are forecasted to move in a north-northwest direction, away from the ASEAN region (JTWC).
GEOPHYSICAL:
Eight (8) 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 Marapi (alert level II), Semeru (alert level II), Raung (alert level II), Ili Lewotolok (alert level III), and Ibu (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 much of the Maritime Continent and parts of southeastern Mainland Southeast Asia; while warmer than usual temperatures are predicted over most of the Maritime Continent and parts of southeastern Mainland Southeast Asia. For the regional assessment of extreme weather events, there is a small increase in chance of very heavy rainfall to occurs over western parts of Java. 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;
Lao PDR: NDMO;
Philippines: NDRRMC, PAGASA, PHIVOLCS;
Thailand: DDPM. TMD;
Viet Nam: VDDMA;
Various news agencies.
