The Thai Meteorological Department forecasts heavy rain in most regions on 26 Sep, with thunderstorms covering 70-80% of the Central, Eastern and Bangkok areas. Flash floods, landslides and waterlogging are possible in low-lying and flood-prone spots. Plan for delayed deliveries and transport, and move stock or equipment off low floors. Small boats in the upper Gulf of Thailand should not leave shore until 27 Sep. Waves in the Gulf reach 2-3 m, and over 3 m where storms occur.