Geological Department Warns 9 Provinces of Heavy Rain, Flash Floods, and Landslide Risk in Hillside Areas
Heavy rainfall across nine provinces including Tak, Phitsanulok, and Nakhon Sawan poses significant risk of landslides and flash floods in hillside areas through May 20, the Geological Department warns.
The Geological Disaster Operations Center under the Department of Mineral Resources issued a warning on May 19, 2026, alerting authorities to monitor landslide and flash flood risks. Heavy continuous rainfall in landslide-prone areas, combined with rainfall forecasts predicting potential landslides, presents significant danger particularly in Tak, Phitsanulok, Nakhon Sawan, Phetchabun, Lopburi, Trat, Loei, Nong Bua Lamphu, and Chaiyaphum provinces.
Metereological forecasts indicate heavy rainfall in northern, northeastern, and central Thailand including Bangkok and surrounding areas over the next 24 hours. The southern western coast and eastern regions face heavy to very heavy rainfall due to a strong southwestern monsoon system affecting the upper Andaman Sea combined with a depression over northern Vietnam.
The public is urged to exercise caution against dangers from heavy rainfall and accumulated water that could trigger sudden flash floods and flash floods, particularly in hillside areas near watercourses and low-lying regions. Community volunteers in at-risk areas are requested to continuously monitor geological disasters and prepare for potential emergencies.
Relevant agencies must closely and continuously track conditions in their areas. If geological disasters occur, officials must promptly inspect affected areas to provide reassurance and initial guidance to residents in vulnerable zones.
