Thailand's Meteorological Department issued a severe weather alert for 43 provinces due to a low-pressure system from Cambodia and seasonal monsoons. Bangkok, central, and eastern regions face 80% probability of heavy rainfall with imminent risks of flash floods, flash flooding, landslides, and hazardous seas (waves 2–3+ meters). Small boats on the upper Gulf are advised to stay ashore until Sept 27. This affects transportation, supply chains, and operations across major commercial hubs.