REGIONAL SUMMARY:
For the twenty-sixth week of 2022, a total of 21 disasters (16 floods, 4 landslides, and 1 wind-related) affected the region. Indonesia and Thailand have reportedly been affected. Strong winds, flooding due to overflowing of rivers and tidal waves, and landslides due to prolonged duration of high-intensity rainfall, were reported by Badan Nasional Penganggulangan Bencana (BNPB) in Central and West Sulawesi, East Nusa Tenggara, Bengkulu, Maluku, Central and West Kalimantan, Riau Islands, West Java, and Aceh. Thailand’s Department of Disaster Prevention and Mitigation (DDPM) reported that the Southwest Monsoon that currently prevails in the Andaman Sea and Gulf of Thailand resulted in flooding in Chiang Rai, Mae Hong Son, and Phayao.
HIGHLIGHT:
According to BNPB, heavy rainfall in Seluma Regency in Bengkulu resulted in flooding in multiple locations (Kec. Seluma Selatan, Talo Kecil, Sukaraja, Air Periukan, Lubuk Sandi, and Semidang Alas Maras). The flooding affected 2,517 families (12.585 persons) and 2,440 houses, displaced 100 people, damaged 1 road and 4 public facilities. Local disaster management agencies coordinate with relevant agencies and organisations to carry out necessary actions and continue to monitor and assess the situation.
Two tropical cyclones developed in the ASEAN region in the past week. TC CHABA developed in the West Philippine Sea and traversed through the South China Sea and Viet Nam’s East Sea before making landfall in the vicinity of China. TC AERE on the other hand, grazed the northwest portion of the Philippine Area of Responsibility but had no direct impacts to the archipelago or the region. No significant impacts were reported by both the National Disaster Risk Reduction and Management Council (NDRRMC) and Viet Nam Disaster Management Authority (VNDMA) related to the TCs.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) showed high 7-day average rainfall spreading across the West Philippine Sea-South China Sea-Viet Nam East Sea and the Philippine Sea due to the development of tropical cyclones CHABA and AERE (respectively); southern coast of Myanmar; Nusa Tenggara and Papua of Indonesia. As of reporting, TC CHABA has dissipated in the vicinity of China and TC AERE is within the vicinity of Japan (JTWC).
GEOPHYSICAL:
Eight (8) significant earthquakes (M?5.0) were recorded in the region by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG), Myanmars’ Department of Meteorology and Hydrology (DMH), the Philippine Institute of Volcanology and Seismology (PHIVOLCS), and Thailands’ Meteorological Department (TMD). Mount Anak Krakatau (alert level III), Semeru (alert level III), and Ili Lewotolok (alert level III), and Taal Volcano (alert level 2), Bulusan Volcano (alert level 1), and Mount Kanlaon (alert level 1) in the Philippines reported recent volcanic activity according to the 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, wetter conditions are expected over much of the southern half of the Maritime Continent; Warmer conditions are expected over the southeastern Maritime Continent and southeastern Mainland Southeast Asia. For the regional assessment of extremes, there is a small increase in chance for very heavy rainfall event to occur in parts of southern Maritime Continent; and a moderate increase in chance for extreme hot conditions to occur in much of the Maritime Continent and coastal parts of southern Viet Nam. La Niña conditions are still present in the Pacific. La Niña conditions are still present in the Pacific. At the seasonal timescale, La Niña events tend to bring wetter conditions to much of the ASEAN region. Negative Indian Ocean Dipole is likely to develop in July. Negative IOD tend to bring wetter conditions to much of the ASEAN region.
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Myanmar: DMH;
Philippines: PAGASA, PHIVOLCS;
Thailand: DDPM, TMD;
Various news agencies.
