All the rivers in the country's north-eastern region are on a rising trend and may inundate low-lying areas, especially Sylhet, Sunamganj, Habiganj and Moulvibazar districts, in the next 48 hours, according to the latest bulletin of the Flood Forecasting and Warning Centre (FFWC).

The FFWC said Surma was flowing 11cm below the danger level, Teesta 23cm and Dudhkumar 56cm as of Sunday morning.

As a result of heavy rainfall in Bangladesh and the adjoining upstream region for the last few days, the major rivers of Sylhet region -- Surma, Kushiyara, Manu, Khowai, Sarigowain, Jhalukhali, Bhugai-Kangsha, Someswari, and Jadukata -- may rise rapidly during the period, said the bulletin.

On Saturday, Lalakhal, Sheola, Habiganj, Kanaighat, Jafflong and Sylhet areas saw over 100mm of rainfall, and Cherrapunji in Meghalaya recorded 161mm.

Last year, the monsoon flood submerged vast lands of these districts from May to July, leading to an emergency since it affected over 7 million people, killed over 130 and damaged Boro croplands. The city streets and localities also went under floodwater, and water remained stagnant for weeks.

The bulletin added that the Teesta River may flow close to danger level in the next 24 hours at Dalia point of Nilphamari and the Dudhkumar River at Pateshwari in Kurigram.

Meanwhile, the water levels of the Brahmaputra-Jamuna and the Ganges-Padma rivers will keep rising in the next 72 hours.