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. [21] [22] 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. [23] [24] [25] [22] An additional 102 others were injured. [26] Surachate Hakparn, former deputy commissioner-general of the Royal Thai Police, claimed that the death toll in Songkhla province was closer to 550, and criticized the Thai government, under Prime Minister Anutin Charnvirakul, for underreporting fatalities, [27] while rescue workers reported up to 1,000 fatalities in Songkhla. [28] 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 went unreported due to being immediately buried by relatives for religious reasons, [29] as one-third of Songkhla's population are Muslims. [30] On 6 December, a funeral director in Hat Yai reported that the bodies of around 700 flood victims were being prepared for cremation. [31]
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). [32] However, the government estimated the loss to be over 500 billion baht (US$15.7 billion). [33] 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. [34] 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; 335 millimetres (13.2 in) in a single day on 21 November 2025. [35] Floodwaters there reached up to 2 m (6.6 ft) deep, stranding 7,000 foreign tourists as a result. [36] [37] [38]
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 [42] and over 3.3 million people were affected in North Sumatra, West Sumatra and Aceh, 1.1 million of which were displaced. [43] [44] At least 1,177 people were killed, 7,000 were injured and 148 were missing in the three provinces. [45] A total of 166,743 houses were damaged, with 53,514 severely damaged, 41,899 moderately damaged, and 71,330 houses experiencing mild damages. [46] At least 734 bridges, 200 health facilities, 875 educational facilities, 806 place of worships, 291 offices and buildings, and 1,900 public facilities were damaged as well. [47] Economic losses related to flooding in Sumatra were estimated to be over 68.7 trillion rupiah (US$4.13 billion), [48] with only around 567.02 million Rupiah (US$33.8 million) being protected by insurance, [49] 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. [50] 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). [51] 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. [52]
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. [53] Carcass of a Sumatran elephant was also found swept away in Aceh after the flood. [54]
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. [55] More than 100 cultural heritage sites were also reported to be damaged following the disaster. [56]
Aceh
The cyclone affected 18 out of a total of 23 regencies and cities in Aceh. [42] As of 4 January 2026, 543 people were killed and 31 were left missing in Aceh, [45] including 213 deaths and 6 missing in North Aceh Regency, 101 deaths in Aceh Tamiang Regency, 57 deaths in East Aceh Regency, 40 deaths and 3 missing in Bireuën Regency, 31 deaths and 14 missing in Bener Meriah Regency, 29 deaths in Pidie Jaya Regency, 23 deaths and 4 missing in Central Aceh Regency, 13 deaths and 1 missing in Southeast Aceh Regency, 6 deaths in Gayo Lues Regency, 5 deaths in Langsa, 5 deaths in Lhokseumawe, 2 deaths in Subulussalam, 1 death and 3 missing in Nagan Raya Regency, and 1 death in Pidie Regency. [57] Furthermore, around 4,300 injuries were reported in the province as of 18 December. [58] At least 526,098 people were affected and 292,806 were displaced. [59] An estimated 46,000 homes in the province were damaged. [60] Some areas of the province lost power after a transmission tower in Bireuen Regency was swept away by floodwaters. [61] Landslides buried roads and hindered access to seven regencies of the province. [62]
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. [63] However, some regency and city governments reported higher figure with 131,586 deaths in North Aceh Regency, [64] 17,871 deaths in East Aceh Regency, [65] 1,815 deaths in Nagan Raya Regency, [66] and 346 deaths and 64 swept away in Singkil. [67]
North Sumatra
The storm affected 18 out of a total of 33 cities and regencies in North Sumatra. [42] As of 4 January 2026, 370 deaths and 43 missing people were reported, [45] including 127 deaths and 37 missing in Central Tapanuli Regency, 88 deaths and 20 missing in South Tapanuli Regency, 55 deaths in Sibolga, 36 deaths and 2 missing in North Tapanuli Regency, 17 deaths in Deli Serdang Regency, 14 deaths in Langkat Regency, 12 deaths in Medan, 10 deaths and 1 missing in Humbang Hasundutan Regency, 2 deaths in Pakpak Bharat Regency, 2 deaths in Nias Regency, 1 death in South Nias Regency, and 1 death in Padangsidimpuan. [57] In addition, 2,300 injuries were reported in the province as of 18 December. [58] In South Tapanuli Regency, at least 19 died in Batang Toru District, [68] 5 in Angkola Sangkunur District, [69] and 2 more in Sipirok and West Angkola Districts. [70] One South Tapanuli resident reported that "dozens" of bodies of flood victims were stored at a makeshift morgue in a community center. [71] A landslide in Angkola Sangkunur District, South Tapanuli Regency, left 20 people missing in two villages. [69] An additional 113 people were injured in the regency. [68] In Central Tapanuli, 507 people were injured [72] and 1,902 houses sustained flood damage in nine sub-districts. [73] In North Tapanuli Regency, flooding and landslides affected 53 communities [74] and left at least 29 people missing in the village of Sibalanga in Adian Koting District [75] and 10 more in Parmonangan District. [76] The Tarutung-Sibolga road was submerged beneath 3 m (9.8 ft) deep floodwaters and blocked by several landslides. [77] Floodwaters in Langkat Regency reached up to 1.6 m (5.2 ft) in some areas, [78] displacing 3,000 families. [70]
West Sumatra
The cyclone affected 16 out of a total of 19 cities and regencies in West Sumatra. [42] As of 4 January 2026, 262 people were killed and 74 were missing in West Sumatra, [45] including 163 fatalities and 38 missing in Agam Regency, 35 deaths in Padang Pariaman Regency, 17 deaths and 30 missing in Padang Panjang, 11 deaths and 2 missing in Padang, 5 deaths and 3 missing in West Pasaman Regency, 1 death in Tanah Datar Regency, 1 death in Solok, [79] 1 missing from Pesisir Selatan Regency, and 29 additional deaths from unidentified locations. [57] In addition, as of 18 December, 382 injuries were reported in the province. [58]
Riau
Dozens of fishermen from Riau reportedly went missing, with six bodies found and several more being found stranded and later rescued. Many fishermen lost their nets and equipment due to high waves attributed to the cyclone, resulting in financial losses in the tens of millions of rupiah. [80]
