REGIONAL SUMMARY:
For the twentieth week of 2022, a total of 26 disasters (19 floods, 1 storm, and 6 wind-related) affected the region. Indonesia and Thailand have reportedly been affected. Moderate to heavy rainfall, strong wind, high tide in the coastal area, and overflowing of the rivers, a lake, and an irrigation channel have caused flooding and wind-related events were reported by Badan Nasional Penganggulangan Bencana (BNPB) over Sumatra, Java, Kalimantan, Sulawesi, and Maluku. According to the Philippine Institute of Vulcanology and Seismology (PHIVOLCS) a M6.1 tectonic earthquake occurred at 21 km of Calatagan Town (Batangas) with a depth of 128 km on 22 May at 1040 hrs UTC+7. As of reporting time, no damages nor casualties have been reported by the National Disaster Risk Reduction and Management Council (NDRRMC). Lastly, flooding, storms, and wind-related events in the Northern, Northeastern, Eastern, and Central Regions of Thailand were reported by the Department of Disaster Prevention and Mitigation (DDPM).
HIGHLIGHT:
According to BNPB, moderate to heavy rainfall and the overflowing of the rivers since 17 May have caused flooding in Sekadau Regency (West Kalimantan), Palangkaraya City, Murung Raya, and North Barito Regency (Central Kalimantan), Kutai Kartanegara Regency (East Kalimantan), and Malinau Regency (North Kalimantan). In total, 7,6K families (36.1K persons) have been affected in West, Central, East, and North Kalimantan Provinces. Reports of damages include 2.8K houses, 3 bridges, roads, 15 schools, 6, health facilities, 7 public facilities, and 17 worship places. Meanwhile, in Medan City (North Sumatra), flooding and tornado caused by high tide and extreme weather on 20 and 22 May affected 11.5K families (45.3K persons), injured 2 persons, and damaged 11.5K houses. Local disaster management agencies have carried out necessary actions and continue to monitor, conduct data collection, assess the situation, and provide support and logistics to the affected people.
HYDRO-METEO-CLIMATOLOGICAL:
For the past week, data from the ASEAN Specialised Meteorological Centre (ASMC) showed high 7-day average rainfall spreading across Kalimantan in Indonesia; and northern Luzon of the Philippines; and southern Myanmar associated with the Low-Pressure Area over north Andaman Sea. As of reporting, there are no active tropical cyclone advisories in the region. (JTWC).
GEOPHYSICAL:
Six (6) significant earthquakes (M?5.0) were recorded in the region by Indonesia’s Badan Meteorologi, Klimatologi, dan Geofisika (BMKG) and PHIVOLCS. Mount Ibu (alert level II), Ili Lewotolok (alert level III), Dukono (alert level II), Anak Krakatau (alert level III), and Semeru (alert level III) in Indonesia, and Taal Volcano (alert level 2), and Mount Kanlaon (alert level 1) 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, wetter conditions are expected over much of Mainland Southeast Asia; drier conditions are expected over much of the equatorial region; cooler conditions are expected over most of Mainland Southeast Asia; and warmer conditions are expected over the western half of the equatorial region. For the regional assessment of extremes, there is a moderate increase in chance for extreme hot conditions to occur in western Maritime Continent. 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.
Sources:
ASEAN Disaster Monitoring & Response System (DMRS); ASEAN Specialised Meteorological Centre (ASMC); Joint Typhoon Warning Centre (JTWC);
Indonesia: BNPB, BMKG, PVMBG;
Philippines: NDRRMC, PAGASA, PHIVOLCS;
Thailand: DDPM;
Various news agencies
