Onrush of water from upstream across the border has triggered flash flood in northern and eastern regions of the country.
Many low-lying areas were inundated due to rise of the water levels of surrounding rivers in the regions.
Water levels of all the major rivers of the country are in rising trend, which may continue in the next 48 hours, he said.
“The water levels of Teesta and Dharla including the other border rivers of the northern part of Bangladesh may rise rapidly and may create temporary flash flood in some places, according to FFWC.
The flood situation of the low lying areas of Sylhet and Sunamganj districts may deteriorate by Sunday, it said.
The Padma River may cross danger level at Goalundo point in the next 48-72 hours.
The flood situation of the low lying areas of Shariatpur and Chandpur districts may deteriorate slightly in the next 24 hours.
A presumably heavy rainfall in the bordering districts in line with the upstream water is likely to cause short-range flooding in Lalmonirhat, Nilphamari, Rangpur, Kurigram and Manikganj districts in the third week of the month, according to a special bulleting of Flood Forecasting and Warning Center (FFWC).
Teesta and Dharola rivers may cross danger level during the time in the area, it said.
A medium range flood may hit Manikganj, Rajbari, Faridpur, Munshiganj, Madaripur and Shariatpur districts in the next two weeks, according to the bulletin.