Heavy Rain Alert Issued for July 6-12 in Thailand, Flash Floods and Landslides Expected

Strategic Insights -

Heavy rain is forecasted to hit Thailand from July 6-12, prompting authorities to issue a critical alert for widespread flash floods, runoff, and landslides nationwide. The Office of the National Water Resources (ONWR) has identified several high-risk areas across all regions of Thailand, urging residents to remain vigilant and prepared at all times.

Key Takeaways:

  • The ONWR has issued Warning No. 10/2025, warning of heavy to very heavy rainfall forecast from July 6-12, with flash floods, runoff, and landslides expected nationwide.
  • Several high-risk areas have been identified across all regions of Thailand, including Northern Region, Northeastern Region, Eastern Region, and Southern Region.
  • The ONWR is working closely with several departments, including the Meteorological Department, the Department of Mineral Resources, the Royal Irrigation Department, and the Department of Disaster Prevention and Mitigation, to assess risks and issue advance warnings for vulnerable areas.
  • Authorities have urged the public to monitor official weather updates and take precautionary measures, particularly those living near rivers, foothills, or flood-prone zones.
  • Residents in high-risk areas should prepare for emergency evacuation and avoid travelling through flooded or landslide-prone routes during the warning period.
  • The ONWR has instructed relevant agencies to urgently release water from reservoirs that have already exceeded capacity and warned of sudden water level rises and riverbank overflows in low-lying regions.
  • The ONWR has ordered the following actions: closely monitoring rainfall and water levels, inspecting and repairing river embankments, activating flood response plans, and informing and warning the public in advance.

Statistics:

  • Heavy to very heavy rainfall forecasted from July 6-12 (ONWR Warning No. 10/2025)
  • Flash floods expected nationwide (ONWR)
  • Landslides and runoff expected in all regions of Thailand (ONWR)
  • 80% of capacity stored in medium and small reservoirs across several provinces (ONWR)
  • Huai Thong and Huai Suang reservoirs in Sakon Nakhon exceeded capacity (ONWR)
  • Nong Ya Ma reservoir in Kalasin exceeded capacity (ONWR)
  • Dan Chumphon reservoir in Trat exceeded capacity (ONWR)
  • Kwan Phayao, Nong Han, and Nong Kut Ting prepared for expected heavy rainfall (ONWR)

Sources:

  • Office of the National Water Resources (ONWR) (Warning No. 10/2025)
  • National Meteorological Department
  • Department of Mineral Resources
  • Royal Irrigation Department
  • Department of Disaster Prevention and Mitigation