The Meteorological Department warns of heavy rain in the north, northeast, east and parts of the south, with flash floods and mudslides possible near streams and low-lying areas. Bangkok and vicinity have thunderstorms over about 70% of the area. Small boats in the upper Andaman Sea and upper Gulf of Thailand should stay in port, and waves of 2-3 m or more are forecast. For a shop or site, plan for delivery delays, move stock off low floors, and secure outdoor work and signage.