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. Over 3.3 million people were affected in North Sumatra, West Sumatra and Aceh, 1.1 million of which were displaced. [42] [43] At least 1,030 people were killed, 7,600 were injured and 206 were missing in the three provinces. [44] At least 158,000 houses were damaged, along with 405 bridges, 219 health facilities, 591 educational facilities, 434 place of worships, 290 offices and buildings, and 1,200 public facilities. [45] Economic losses related to flooding in Sumatra were estimated to be over 68.7 trillion rupiah (US$4.13 billion), [46] 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. [47] 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). [48] 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. [49]
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. [50]
Aceh
As of 15 December, 431 people were killed, 1,958 were injured [43] and 32 were left missing in Aceh, [44] including 48 deaths in North Aceh Regency, [51] 22 in Bener Meriah Regency, 20 in Central Aceh Regency, 16 in Pidie Jaya Regency, 11 each in Bireuen and Southeast Aceh Regency and 12 elsewhere, while 526,098 others were affected and 292,806 were displaced. [52] An estimated 46,000 homes in the province were damaged. [53] Some areas of the province lost power after a transmission tower in Bireuen Regency was swept away by floodwaters. [54] Landslides buried roads and hindered access to seven regencies of the province. [55]
North Sumatra
As of 15 December, 355 people were killed and 84 were missing, [44] including 88 deaths and 109 missing in Central Tapanuli Regency, [56] 81 deaths in South Tapanuli Regency, 53 in Sibolga, 34 in North Tapanuli Regency, 17 in Deli Serdang Regency, 12 in Medan, 11 in Langkat Regency, 9 in Humbang Hasundutan Regency, 2 in Pakpak Bharat Regency and 1 each in Nias and Padangsidimpuan. [57] In South Tapanuli Regency, 19 died in Batang Toru District [58] 5 in Angkola Sangkunur District [59] and 2 more in Sipirok and West Angkola Districts. [60] One South Tapanuli resident reported that "dozens" of bodies of flood victims were stored at a makeshift morgue in a community center. [61] A landslide in Angkola Sangkunur District left 20 people missing in two villages. [59] An additional 113 people were injured in the regency. [58] In Central Tapanuli, 507 people were injured [62] and 1,902 houses sustained flood damage in nine sub-districts. [63] In North Tapanuli Regency, flooding and landslides affected 53 communities [64] and left 39 people missing, including 29 in the village of Sibalanga in Adian Koting District [65] and 10 more in Parmonangan District. [66] The Tarutung-Sibolga road was submerged beneath 3 m (9.8 ft) deep floodwaters and blocked by several landslides. [67] Floodwaters in Langkat Regency reached up to 1.6 m (5.2 ft) in some areas, [68] displacing 3,000 families. [60]
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. [76]
