Department of Disaster Prevention Alerts 54 Provinces to Monitor Flash Floods and Sudden Flooding from 14 to 18 May 2026

The Department of Disaster Prevention and Mitigation (DDPM) has alerted 54 provinces across the North, Northeast, Central, and Southern regions to monitor for flash floods, sudden flooding, waterlogging, and strong waves from 14 to 18 May 2026 GMT+7.

At 18:30 on 13 May 2026 GMT+7, Mr. Theerapat Kachamat, Director-General of the Department of Disaster Prevention and Mitigation (DDPM), stated that the Central Disaster Prevention and Mitigation Command Center (CDPMCC) has been tracking weather conditions and assessing risk factors. The Meteorological Department issued an announcement (No. 61/2569) warning of heavy to very heavy rain over Thailand and strong winds in the Andaman Sea area, effective from 14 to 18 May 2026 GMT+7. It forecasts increased rainfall with heavy to very heavy rain in some areas of the North, Central, and South regions, which may cause sudden flooding and flash floods.

Strong winds are expected over the Andaman Sea and the Gulf of Thailand. Wave heights in the Andaman Sea will reach 2–3 meters, with waves exceeding 3 meters in stormy areas. In the upper Gulf of Thailand, waves will be high, exceeding 2 meters in stormy zones. Areas expected to experience heavy rainfall with potential flash floods, sudden flooding, waterlogging, and strong waves between 14 and 18 May 2026 GMT+7 are detailed as follows.

Areas to monitor for flash floods, sudden flooding, and waterlogging.

• Northern Region. Seventeen provinces: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Phayao, Phrae, Nan, Uttaradit, Tak, Sukhothai, Kamphaeng Phet, Phitsanulok, Phichit, Phetchabun, Nakhon Sawan, and Uthai Thani.
• Northeastern Region. Twelve provinces: Loei, Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Chaiyaphum, Mukdahan, Amnat Charoen, Nakhon Ratchasima, Sisaket, and Ubon Ratchathani.
• Central Region. Eleven provinces: Kanchanaburi, Ratchaburi, Suphan Buri, Nakhon Nayok, Prachin Buri, Chonburi, Rayong, Chanthaburi, Trat, Phetchaburi, and Prachuap Khiri Khan.
• Southern Region. Fourteen provinces: Chumphon, Surat Thani, Nakhon Si Thammarat, Phatthalung, Songkhla, Pattani, Yala, Narathiwat, Ranong, Phang Nga, Phuket, Krabi, Trang, and Satun.

Areas to monitor for strong waves.

• Southern Region. Six provinces: Ranong (Mueang Ranong, Suk Samran, and Kapoe districts); Phang Nga (Ko Yao, Takua Thung, Thai Muang, Takua Pa, and Kuraburi districts); Phuket (all districts); Krabi (Mueang Krabi, Khlong Thom, Ko Lanta, Nuea Khlong, and Ao Luek districts); Trang (Kantang, Sikao, Palian, and Hat Samran districts); and Satun (Mueang Satun, La-ngu, Tha Phae, and Thung Wa districts).

The Central Disaster Prevention and Mitigation Command Center (CDPMCC), under the Department of Disaster Prevention and Mitigation (DDPM), has coordinated to notify 54 provinces and regional disaster prevention centers in risk areas to prepare for heavy to very heavy rainfall, which could cause flooding. Officials have been instructed to closely monitor weather, rainfall amounts, and water conditions in their areas. Teams with disaster response machinery have been deployed to risk zones to promptly respond and assist the public.

Officials are also assigned to continuously watch risk areas and stand ready to respond and assist immediately if incidents occur, around the clock. Provinces are urged to inform residents to closely follow weather updates and official news and to warn people in risk areas in advance so they can prepare accordingly by strictly following government advice.

Residents in risk areas are advised to continuously monitor weather conditions, official warnings, local water situations, and government announcements. They should prepare to respond to possible emergencies. Updates and warnings can be followed through the application. "THA DISASTER ALERT" Additionally, people can report emergencies via the Line application "DDPM Incident Report 1784" or call the 24-hour emergency hotline 1784 for coordination and assistance.