The Meteorological Department forecasts rain over 40-60% of areas for the next 24 hours, with heavy rain in parts of the north, northeast, central and east, and Bangkok. Flash floods and mountain runoff are the main risk near slopes and low-lying land. Sea waves reach 2-3 m in the Andaman and upper Gulf, so small boats should stay in port. If your stock, delivery routes or premises are in these provinces, move goods off the ground and plan for delayed transport.