The Office of the National Water Resources (ONWR) has warned 20 provinces to prepare for possible flash floods, forest runoff, landslides and river overflows from Aug 2-4 as heavy rain is forecast in several regions.
The warning was issued on Sunday as an intensifying monsoon trough and strengthening southwesterly monsoon are expected to bring heavy to very heavy rain, particularly to the North, Northeast, East and South.
The agency said a monsoon trough stretching across Myanmar and northern Laos into a low-pressure cell, combined with stronger southwesterly winds, would affect several parts of the country.
