Thailand Issues Heavy Rain and Flash Flood Warning for 43 Provinces

On September 23, 2026, the Thai Meteorological Department (TMD) issued a significant weather warning for September 24, 2026, affecting 43 provinces across Thailand. The forecast indicates heavy to very heavy rainfall, particularly in the lower North, Northeast, Central region—including Bangkok and its surrounding areas—and the East.

According to the TMD, a strong low-pressure system moving from Cambodia, combined with a monsoon trough and a strengthening southwest monsoon, is driving these conditions. Residents and travelers are advised to exercise extreme caution regarding the risk of flash floods, forest runoff, and landslides, especially in low-lying areas and regions near mountain slopes.

Marine conditions are also affected, with the upper Gulf of Thailand experiencing waves between 2 and 3 meters, while the lower Gulf and upper Andaman Sea face waves of approximately 2 meters. In areas with thunderstorms, wave heights may exceed 3 meters. Mariners are urged to navigate with caution.

For those currently in Thailand, it is recommended to monitor local news for updates, avoid travel through areas prone to recurring flooding, and stay clear of waterways during heavy downpours. While the TMD has provided this forecast, the exact duration and intensity of the rainfall in specific localities remain subject to change based on the movement of the low-pressure system.