Thailand Flooding in Thailand affected 3.6 million people in 1.2 million homes, and caused flooding in 20
provinces, mainly in
the country's south. At least 297 deaths were officially confirmed in the country, including 229 in
Songkhla province, 19 in
Phra Nakhon Si Ayutthaya province, 10 in
Nakhon Si Thammarat province, 9 in
Pattani, 5 each in
Yala and
Satun provinces, 4 each in
Narathiwat and
Phatthalung provinces, 3 each in
Sing Buri,
Suphan Buri province and
Trang provinces, and 1 each in
Phitsanulok,
Nonthaburi and
Pathum Thani provinces. while rescue workers reported up to 1,000 fatalities in Songkhla. On 2 December, in response to the alleged lack of transparency from the Thai government about the true number of casualties, Surachate created a website with the goal of compensating families of unrecorded fatalities, pressure the Thai government to improve its response to disasters and providing more accurate fatality figures, particularly for
Muslim deaths that may have gone unreported due to being immediately buried by relatives
for religious reasons, as one-third of Songkhla's population are Muslims. On 6 December, a funeral director in Hat Yai reported that the bodies of around 700 flood victims were being prepared for
cremation. The
University of the Thai Chamber of Commerce estimate the economic loss of the flooding in
Southern Thailand to be 40 billion
baht (US$1.24 billion). However, the government estimated the loss to be over 500 billion baht (US$15.7 billion). As of 28 November, flooding in Songkhla province destroyed two homes and damaged 1,074 others, along with 228 roads, 12 bridges, 41 schools and 38 temples. The worst effects of the flooding were seen in
Hat Yai, due to its geography and limited water drainage. The city recorded its heaviest rainfall in at least 300 years; in a single day on 21 November 2025. Floodwaters there reached up to deep, stranding 7,000 foreign tourists as a result.
Malaysia Flooding also occurred in
Peninsular Malaysia, killing three people, including two in
Kelantan and forcing over 34,000 others to evacuate across the country.
Indonesia As Senyar traversed through the Strait of Malacca and intensified into a cyclonic storm, it also brought flooding to the Indonesian island of
Sumatra. A total of 52
cities and
regencies and over 3.3 million people were affected in
North Sumatra,
West Sumatra and
Aceh, 1.1 million of which were displaced. At least 1,201 people were killed, 7,000 were injured and 142 were missing in the three provinces. A total of 170,050 houses were damaged, with 53,412 heavily damaged, 45,085 moderately damaged, and 76,553 houses experiencing mild damages. At least 810 bridges, 215 health facilities, 4,456 educational facilities, 803
place of worships, 291 offices and buildings, and 1,900 public facilities were damaged as well. Economic losses related to flooding in Sumatra were estimated to be over 68.7 trillion
rupiah (US$4.13 billion), with only around 567.02 million Rupiah (US$33.8 thousand) being protected by
insurance, possibly making it the costliest disaster in post-
independence Indonesia, surpassing the
2004 Indian Ocean earthquake and tsunami and the
2006 Yogyakarta earthquake when not accounting for
inflation. The Head of the
Indonesian House of Representatives' Commission VIII, focusing in matters including disaster management, argued that the true figure may exceed 200 trillion rupiah (US$12 billion).
Minister of Villages and Development of Disadvantaged Regions,
Yandri Susanto stated that hundreds of villages in Aceh, North Sumatra, and West Sumatra were devastated, with many being completely destroyed. The large number of fatalities resulting from this disaster made it the deadliest natural disaster in Indonesia since the
2018 Sulawesi earthquake and tsunami, which killed 4,340 people. The cyclonic storm also affects the Sumatran wildlife, particularly the
critically endangered Tapanuli orangutan. It was estimated that between 6.2% to 10.5% out of the fewer than 800 remaining orangutans were killed by the floods and landslides, making it an
extinction-level disturbance for the species, especially considering the orangutans' nature to only reproduce every 6–9 years. Carcass of a
Sumatran elephant was also found swept away in Aceh after the flood. The resulting flood damaged two railway bridges part of the
UNESCO World Heritage Site Ombilin Coal Mine, BH 171 Km 69+297 and BH 163 Km 67+524, leading to the structures being considered for demolition. More than 100
cultural heritage sites were also reported to be damaged following the disaster.
Aceh The cyclone affected 18 out of a total of 23 regencies and cities in Aceh. Furthermore, around 4,300 injuries were reported in the province as of 18 December. At least 526,098 people were affected and 292,806 were displaced. An estimated 46,000 homes in the province were damaged. Some areas of the province lost power after a transmission tower in Bireuen Regency was swept away by floodwaters. Internet connections were also disrupted as well due to the lack of electricity. Disrupted networks included
Telkomsel,
Indosat,
XLSmart,
3, and
Smartfren.
Gojek and
Grab had problems due to the lack of internet services. Landslides buried roads and hindered access to seven regencies of the province. Report on
livestock death toll in Aceh varies. Aceh Hydrometeorological Disaster Management Command Post reported at least 27,960 livestocks death in 13 regencies and cities as of 25 December, including 9,255 in Pidie Jaya Regency, 7,148 in Lhokseumawe, 5,426 in East Aceh Regency, 3,159 in Bireüen Regency, 2,917 in South Aceh Regency, 333 in Gayo Lues Regency, 322 in Langsa, 322 in Nagan Raya Regency, 238 in Pidie Regency, 226 in
Singkil, 214 in
West Aceh Regency, 132 in Central Aceh Regency, and 41 in Subulussalam. The report still excludes data from North Aceh Regency, Bener Meriah Regency, Aceh Tamiang Regency, Southeast Aceh Regency, and
Aceh Besar Regency. However, some regency and city governments reported higher figure with 131,586 deaths in North Aceh Regency, 17,871 deaths in East Aceh Regency, 1,815 deaths in Nagan Raya Regency, and 346 deaths and 64 swept away in Singkil.
North Sumatra The storm affected 18 out of a total of 33 cities and regencies in North Sumatra. In addition, 2,300 injuries were reported in the province as of 18 December. One South Tapanuli resident reported that "dozens" of bodies of flood victims were stored at a makeshift
morgue in a community center. A landslide in Angkola Sangkunur District, South Tapanuli Regency, left 20 people missing in two villages. An additional 113 people were injured in the regency. BNPB data also reported that 3,500 houses were severely damaged, 4,100 houses moderately damaged, 20,500 houses lightly damaged. Furthermore, 271 bridges were damaged, and up to 282 educational facilities were damaged. In Central Tapanuli, 507 people were injured and 1,902 houses sustained flood damage in nine sub-districts. In North Tapanuli Regency, flooding and landslides affected 53 communities and left at least 29 people missing in the village of Sibalanga in Adian Koting District and 10 more in Parmonangan District. The
Tarutung-Sibolga road was submerged beneath deep floodwaters and blocked by several landslides. Floodwaters in Langkat Regency reached up to in some areas, displacing 3,000 families. 1 missing from
Pesisir Selatan Regency, and 31 additional deaths from unidentified locations. In addition, as of 18 December, 382 injuries were reported in the province. ==Aftermath==