Warnings issued by DDPM related to potential floods and mudslides in 20 provinces, expected to occur from July 6 to July 12.
From July 6 to 12, 2025, Thai authorities have issued a heavy rain warning for 33 provinces across the North, Northeast, Central, and Southern regions of the country[1][3]. This warning comes in response to forecasted heavy rainfall and the potential risks of flash floods, forest runoff, and mudslides.
### Affected Provinces and Regions
The northern provinces affected include Chiang Rai, Phayao, Nan, Tak, Mae Hong Son, Chiang Mai, Lampang, Phrae, and Phitsanulok. In the northeast, Loei, Nong Khai, Bueng Kan, Udon Thani, Sakon Nakhon, Nakhon Phanom, Yasothon, and Ubon Ratchathani are under warning. Central and eastern provinces such as Chon Buri, Rayong, Chanthaburi, and Trat are also at risk. The southern provinces of Surat Thani, Ranong, Phangnga, and Phuket have been issued warnings as well[1][3].
Additional warnings have been issued for Bangkok and surrounding provinces, where thunderstorms are expected to cover 60% of the area, and heavy rains are expected to affect about 70% of the northern and northeastern regions[2][5].
### Key Details and Precautions
In response to this warning, the Department of Disaster Prevention and Mitigation (DDPM) and other agencies are maintaining 24-hour readiness and are closely monitoring sudden water level changes, particularly in reservoirs exceeding 80% capacity and the Mekong River[1][3]. Authorities are also urged to inspect and repair flood barriers, clear water flow obstructions, and manage water systems efficiently from source to sea[1][3].
Early warning systems such as the Cell Broadcast Service (CBS) will notify the public immediately if severe flooding or mudslides are imminent[1]. The alert is driven by a combination of a low-pressure system over northern Vietnam, an active southwest monsoon, and intensified storm activities in the region[2].
Residents in these provinces are advised to stay alert to weather updates, prepare for potential evacuations, and follow instructions from local officials to mitigate risks from flash floods and mudslides during this period. It is crucial to prioritise safety and take necessary precautions to ensure the wellbeing of all individuals in these areas.
- The weather conditions could significantly impact political decisions regarding travel in the affected provinces, as authorities might need to implement temporary travel restrictions to ensure safety.
- In the coming days, the heavy rainfall may also affect environmental-science studies, particularly in the areas of hydrology and meteorology, due to the potential for data collection being disrupted by the flooding.
