The flood situation in Sylhet, Sunamganj, and Netrokona districts may further deteriorate in the next 24 hours, according to the Flood Forecasting & Warning Centre's latest bulletin.

According to the forecast circulated Saturday afternoon, water levels in all major rivers of the country continued rising, except the Surma in Sylhet - although may just have been due to being way over the red mark already.

Another transboundary river that was flowing way past its danger mark, the Teesta, may also normalise a bit, remaining near or slightly above its danger mark in the next 24 hours.

Read: No respite from flood onslaught in north-eastern districts

As a result, the flood condition may deteriorate in the low-lying areas of Kurigram, Gaibandha, Bogura, Sirajganj, Jamalpur, Lalmonirhat, Nilphamari, and Rangpur districts.

As important as the forecast for Bangladesh, medium to heavy and even very heavy rainfall is predicted in the north-eastern region of India, over parts of Assam, Meghalaya, and the Sub-Himalayan parts of West Bengal, in the next 72 hours.

Meghalaya is home to Mawsynram and Cherrapunji, which are known as the two wettest places in the world.

On Friday, the Sohra region of Meghalaya's Cherrapunji recorded its third highest rainfall ever in a 24-hour period, with 972.0 mm of rain. It added up to some 2500 mm since Wednesday, its highest 3-day count of rainfall in 27 years, that most likely triggered the dangerous deterioration of the situation in Sylhet and Sunamganj witnessed since Thursday.

Read: Flood situation turns grim: Power supply to Sylhet, Sunamganj suspended

Mawsynram recorded 1003.6 mm on Friday, its highest ever for a 24-hour period in June.

As a result, the Brahmaputra-Jamuna, the Ganges-Padma, the Surma, the Kushiyara, the Teesta, the Dharla, the Dudkumar, and all other major rivers of Bangladesh may continue rising in the next 48 hours, FFWC added.