Indonesia: ASEAN Weekly Disaster Update Week 21 | 18 – 24 May 2026

Countries: Indonesia, Malaysia, Philippines, Viet Nam

Source: ASEAN Coordinating Centre for Humanitarian Assistance

Please refer to the attached Infographic.

REGIONAL SUMMARY:

During the twenty-first week of 2026, a total of 50 disaster events were reported across the ASEAN region, including floods, landslides, storms, and wind-related disasters in Indonesia, Malaysia, the Philippines, Thailand, and Viet Nam. In Indonesia, Badan Nasional Penanggulangan Bencana (BNPB) reported disaster events across Aceh, Jakarta, West Java, Central Java, East Java, South Kalimantan, Central Kalimantan, East Kalimantan, North Maluku, and Central Sulawesi. In Malaysia, Agensi Pengurusan Bencana Negara (NADMA) reported flooding in Sabah. In the Philippines, National Disaster Risk Reduction and Management Council (NDRRMC) and Department of Social Welfare and Development (DSWD) reported flooding, landslides, storms, and wind-related disasters in Davao, North Cotabato, and Zamboanga City. Meanwhile, in Thailand, Department of Disaster Prevention and Mitigation (DDPM) reported flooding, storms, and wind-related disasters in Nan, Lampang, and Nakhon Ratchasima. Lastly, in Viet Nam, Viet Nam Disaster and Dyke Management Authority (VDDMA) reported storms, winds, flooding, and landslides in An Giang, Lam Dong, Ca Mau, Tuyen Quang, Son La, Phu Tho, Lang Son, Dien Bien, Tthai Nguyen, and Quang Ninh.

HIGHLIGHT:

In Indonesia, flooding affected both Pasuruan Regency and Pasuruan City in East Java Province following heavy rainfall on 19 May. In Pasuruan Regency, intense rainfall in the upstream areas of Pandaan, Purwodadi, and Purwosari increased water discharge in the Kedunglarangan and Welang river basins, resulting in flooding across Purwosari, Bangil, Pandaan, Pohjentrek, and Kraton. Meanwhile, in Pasuruan City, heavy rainfall between 1930H and 2130H UTC+7 overwhelmed drainage systems, causing water overflow and inundation in Gadingrejo, Purworejo, and Panggungrejo. According to BNPB, as of 22 May, these flooding situations affected approximately 3.3K households and impacted around 3.3K houses across both Pasuruan Regency and Pasuruan City. In addition, 13 road access points were disrupted. Relevant authorities are undertaking the necessary response measures to address the situation. ...