Safety
ONWR Issues Flood Warning for Nan Basin as Heavy Rain Expected
The Office of the National Water Resources (ONWR) has warned of potential renewed flooding in Nan province due to forecasted heavy rainfall on August 23-24.
According to a report by Prachachat Business on August 21, 2026, the Office of the National Water Resources (ONWR) has announced that while floodwaters in Nan province are currently receding and returning to riverbanks, the situation remains precarious. Authorities are actively engaged in recovery efforts in affected areas; however, the ONWR has issued a warning for a new wave of heavy rainfall expected between August 23 and 24.
Residents and travelers in the upper Nan River basin should exercise caution, as nine specific districts are under close observation due to high levels of accumulated rainfall. The ONWR has emphasized the necessity of maintaining operational readiness for Early Warning systems to detect potential flash floods.
For those currently in or planning to visit Nan, it is important to monitor local weather updates and follow instructions from provincial authorities. While the immediate flooding is subsiding, the risk of renewed water surges remains a concern. It is not yet confirmed how significantly the upcoming rainfall will impact infrastructure or transportation routes in the targeted districts. Travelers are advised to stay informed through official channels and remain prepared for potential changes in local conditions.