REGIONAL SUMMARY:
For the thirty-second week of 2024, the ASEAN region faced 31 disasters, including floods, landslides, storms, wind-related disasters, and drought. Indonesia, Malaysia, Thailand, the Philippines, and Viet Nam were affected by these disasters. Additionally, the Philippines reported ongoing impacts from the combined effects of the Southwest Monsoon, Tropical Cyclones PRAPIROON, and GAEMI since week 28 over 17 regions (NDRRMC). Likewise, the Department of Disaster Prevention and Mitigation (DDPM) reported impacts of the flooding that started in Week 31 that had already affected 16 provinces. The Badan Nasional Penanggulangan Bencana (BNPB) of Indonesia reported flooding, landslides, drought, and wind-related disasters in South Sulawesi, Sidenreng Rappang, Central Sulawesi, North Maluku, Gorontalo, South Kalimantan, Lampung, North Sumatra, East Kalimantan, and Aceh. In Malaysia, Agensi Pengurusan Bencana Negara (NADMA) reported floods in Selangor, Perak, Melaka, and Negeri Sembilan. Meanwhile, the NDRRMC reported flooding and storm in Sultan Kudarat. Lastly, the Viet Nam Disaster and Dyke Management Authority (VDDMA) recorded storms, flooding, and landslides in several provinces over Northern Region.
HIGHLIGHT:
In Indonesia, continuous moderate to heavy rainfall in South Sulawesi caused increased water level in several river channels that eventually overflowed and caused widespread flooding. According to the BNPB, several days of moderate precipitation in Wajo Regency resulted to overflowing of Awo and Siwa Rivers. The flood reached six villages and expanded in 4 sub-districts, with flood water level up to 120cm. Meanwhile, in Luwu Regency, several hours of heavy rainfall caused high water discharge in several rivers that also overflowed into residential areas and road networks. Flood levels reportedly ranged from 50-95cm. The floods affected 12.3K persons (3.5K families) and damaged about 3.5K houses in South Sulawesi. Authorities deployed rapid assessment and response teams and immediately provided support to affected communities.
Meanwhile, in Thailand, the DDPM reported that the widespread flooding in 12 Provinces caused by the Southwest Monsoon from Week 31, had expanded to 16 provinces. As of 11 August, the floods had reportedly affected 14.1K households (about 70.5K individuals), with 2 fatalities and 5 injuries. Authorities and relevant organisations immediately surveyed the affected areas and provided assistance to the flooded communities.
In the Philippines, the NDRRMC continues to provide updates on the impacts of the combined effects of the Southwest Monsoon and Tropical Cyclones PRAPIROON and GAEMI. As of this reporting period, the NDRRMC has accounted 6.47M affected individuals, 48 fatalities, 16 missing individuals, and 2 injuries. A total of 8.6K houses have been damaged, of which 1.2K are totally damaged. According to NDRRMC, 1.14M individuals remain displaced and 125 evacuation centres are still serving displaced families. As of 11 August, an estimated 9.18M USD worth of assistance has been provided to the affected communities from DSWD, OCD, AHA Centre, LGUs, NGOs, and others. The AHA Centre remains committed to liaising with NDRRMC-OCD and stands ready to provide further support as needed.
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, Cambodia, Indonesia (Northern Sumatra, Kalimantan, Sulawesi, Maluku, and Papua), Lao PDR, Malaysia, Myanmar, Thailand, the Philippines, and Viet Nam. As of reporting, Tropical Disturbance INVEST 91W was estimated based on all available data at 1,520 km east northeast of Extreme Northern Luzon. Invest 91W is tracking northward towards mainland Japan. It is forecast to continue this track over the next 48 hours with high potential for development into a significant tropical cyclone within 24 hours (JTWC).
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 Semeru (alert level II), Lewotobi Laki-laki (alert level III), and Ibu (alert level III) in Indonesia, and Mayon Volcano (alert level 1), Taal (alert level 1), Kanlaon (alert level 2), and Bulusan (alert level 1) 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 and eastern Mainland Southeast Asia and the Philippines. Drier conditions are also predicted over the southern Maritime Continent. Wetter conditions are predicted over much of the equatorial region. Warmer than usual temperature is predicted over much of southern and eastern Mainland Southeast Asia, and the Philippines. Warmer than usual temperature is also predicted over parts of the western and southern Maritime Continent. For regional assessment of extremes, there is a small increase in chance of very heavy rainfall over southern Thailand and northern Sumatra. There is a moderate increase in chance for extreme hot conditions over the northern half of the Philippines, southern Mainland Southeast Asia (in particular central Myanmar, western Thailand, southern Lao PDR, eastern Cambodia, and southern Viet Nam). There is also a small increase in chance over northern Mainland Southeast Asia, northern Peninsular Malaysia, and southern Sumatra. La Niña conditions are expected to develop during August-September 2024 (ASMC).
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, PAGASA, PHIVOLCS;
Thailand: DDPM;
Viet Nam: VDDMA;
Various news agencies.
