Water rushing in from the Himalayas and incessant rainfall has pushed up the waters of 18 rivers above danger level throughout Bangladesh, last reported.
While the water is predicted to rise further along Jamuna, Padma, Surma and Brahmaputra, more rainfall is likely to be on the cards due to an active monsoon.
Flood Forecasting and Warning Centre of Bangladesh says that the waters of Brahmaputra-Jamuna, already flowing above danger level, will rise for the next 72 hours.
The water of Ganges-Padma river will continue to rise for the next 72 hours and that of Surma-Kushiyara river will do the same over the next 24 hours, the latest bulletin said.
With rising waters, the most-affected regions will be the north, where already the flood has already turned situation bad, and some districts of Sylhet division.
Waters of 77 other rivers have also risen, the forecasting centre says.
Meanwhile, the Met Office forecasts that there will be no respite from rain. It has forecast of more rainfall across the northern divisions along with central Bangladesh and Chittagong belt.
Heavy rainfall is likely and there are dangers of landslides occurring in the hilly areas, Bangladesh Meteorological Department said in its latest bulletin.