Heavy Rain Warning Issued for Chiang Rai 31 August to 3 September

CHIANG RAI – The Meteorological Department advises that in the next 72 hours, thunderstorms and heavy rain will continue in parts of northern, northeastern, and western coastal regions of southern Thailand.

People in areas like Mae Hong Son, Chiang Mai, Chiang Rai, and Nan should stay alert for possible dangers caused by heavy rainfall and water accumulation. Flash floods or landslides could happen, especially near hillsides, rivers, and in low-lying places.

A monsoon trough is moving across the upper north into a low-pressure area over Laos and northern Vietnam. At the same time, a moderate southwesterly monsoon is covering the Andaman Sea, Thailand, and the Gulf of Thailand.

Storms in the Andaman Sea and the upper Gulf of Thailand remain steady, with waves in the upper Andaman Sea reaching about 2 metres. The upper Gulf of Thailand and lower Andaman Sea can expect waves between 1 and 2 metres.

Areas with thunderstorms may see waves above 2 metres. All boat operators should take extra care, especially in storm-affected areas, and avoid going out to sea during heavy storms.

The Royal Irrigation Department has put out a warning for 33 provinces to watch for flash floods, landslides, flooding, and high river levels from 30 August to 3 September.

Areas at risk include:

North

Chiang Rai: Mueang Chiang Rai, Mae Sai, Chiang Khong, Chiang Saen, Wiang Chai, Wiang Chiang Rung, Phaya Mengrai, Thoeng, Mae Chan, Doi Luang
Mae Hong Son: Mueang Mae Hong Son, Pai, Khun Yuam, Mae Sariang
Chiang Mai: Mae Chaem, Fang, Mae Ai, Omkoi
Nan: Tha Wang Pha, Bo Kluea, Pua, Phu Phiang, Mae Charim, Wiang Sa, Santi Suk
Uttaradit: Nam Pat
Tak: Tha Song Yang, Mae Ramat, Mae Sot, Phop Phra, Umphang
Phitsanulok: Mueang Phitsanulok, Chat Trakan, Nakhon Thai, Noen Maprang
Phetchabun: Mueang Phetchabun, Khao Kho, Wang Pong, Lom Kao

Northeast

Loei: Mueang Loei, Chiang Khan, Na Haeo, Pak Chom
Nong Khai: Mueang Nong Khai, Tha Bo, Si Chiang Mai, Sakhrai
Nakhon Phanom: Mueang Nakhon Phanom, Si Songkhram, Tha Uthen, Ban Phaeng
Chaiyaphum: Mueang Chaiyaphum, Kaset Sombun, Khon Sawan
Khon Kaen: Mueang Khon Kaen
Kalasin: Mueang Kalasin, Yang Talad, Khong Chai, Kamalasai, Rong Kham
Nakhon Ratchasima: Khru Buri, Non Daeng, Bua Lai, Prathai, Pak Chong, Muang Yang, Sida
Maha Sarakham: Mueang Maha Sarakham
Nong Bua Lamphu: Si Bun Rueang
Udon Thani: Ban Dung, Phibun Rak, Phen, Sang Khom
Sakon Nakhon: Mueang Sakon Nakhon, Wanon Niwat, Akat Amnuai
Roi Et: Mueang Roi Et, Selaphum, Phanom Phrai, At Samat
Yasothon: Mueang Yasothon, Kham Khuean Kaeo, Huang Nok Ta
Amnat Charoen: Mueang Amnat Charoen, Chanuman, Senangkhanikhom, Hua Taphan
Ubon Ratchathani: Mueang Ubon Ratchathani, Khong Chiam, Det Udom, Trakan Phutphon, Tan Sum, Buntharik, Phibun Mangsahan, Si Muang Mai, Sawang Wirawong, Sirindhorn

East

Nakhon Nayok: Mueang Nakhon Nayok, Ban Na, Pak Phli
Prachin Buri: Mueang Prachin Buri, Nadi, Prachantakham
Sa Kaeo: Mueang Sa Kaeo, Khok Sung, Tha Phraya, Watthana Nakhon
Chonburi: Bang Lamung, Si Racha
Rayong: Mueang Rayong, Ban Khai, Pluak Daeng, Nikhom Phatthana
Chanthaburi: Mueang Chanthaburi, Kaeng Hang Maeo, Khlung
Trat: Mueang Trat, Ko Kut, Khao Saming, Khlong Yai, Bo Rai

South

Chumphon: Mueang Chumphon, Phato, Lang Suan
Ranong: Mueang Ranong, Kra Buri, Kapoe, Suk Samran
Surat Thani: Tha Chana, Ban Ta Khun, Phanom
Phang Nga: Mueang Phang Nga, Kapong, Khura Buri, Takua Pa, Thap Put, Thai Mueang
Phuket: Mueang Phuket, Kathu, Thalang

Reservoir Monitoring Due to Heavy Rain

Keep a close watch on medium and small reservoirs that are over 80 percent full. These include areas in Chiang Rai, Chiang Mai, Lampang, Phayao, Nan, Phrae, Uttaradit, Tak, Loei, Bueng Kan, Sakon Nakhon, Udon Thani, Chaiyaphum, Kalasin, Nakhon Phanom, Mukdahan, Nakhon Ratchasima, Si Sa Ket, Ubon Ratchathani, Nakhon Nayok, Prachin Buri, Rayong, Chanthaburi, Trat, Ranong, Surat Thani, and Krabi. Water management should also be checked at Sirikit and Pha Chuk dams in Uttaradit, Naresuan dam in Phitsanulok, and Khwae Noi dam in Nakhon Thai district, Phitsanulok.

Rising River Levels and Flood Risks Due to Heavy Rain

Monitor rising river levels, overflow, and flash floods in low-lying areas. Pay special attention to: the main river and branches of the Sai River in Mae Sai district, Chiang Rai; the Ing River in Chiang Kham, Thoeng, Phaya Mengrai, Khun Tan, and Chiang Khong districts of Chiang Rai; the Yom River in Mueang, Song, and Wang Chin districts in Phrae, as well as Mueang Sukhothai and Si Samrong in Sukhothai, and Bang Rakam in Phitsanulok; the Nan River in Mueang and Wiang Sa districts of Nan, and Tron district of Uttaradit; the Khwae Noi River in Nakhon Thai district of Phitsanulok; and the Yang River.