Around three lakh people of five upazilas of Sylhet district have been marooned due to an onrush of water from upstream and heavy showers.

Low-lying areas, including houses, roads, educational institutions, and shops of the upazilas were inundated.

There have been heavy rains since Wednesday morning, which worsened the flood situation.

More than 300 villages, educational institutions, and roads of Companiganj, Gowainghat, and Jaintapur upazilas went under water. Forty-two shelters were opened in Gowainghat for the flood-hit people.

Meanwhile, the water of the River Surma entered houses and shops in Sylhet city. It seeped into the wholesale market at Kalighat and Mohajon Potti for the second time in one month.

Road communications among all unions of Gowainghat upazila were snapped. Around 90 percent of people of the upazila were stranded.

Purbo and Paschim and Moddho Jaflong, Purbo and Paschim Alir Gaon, Rustampur, Tuakul, and Lengura were also inundated.

Tahmilur Rahman, upazila nirbahi officer of Gowainghat, said: "Many people have become marooned due to the second phase flood. The administration has prepared 42 shelters, and initiative has been taken to take the affected people there."

Meanwhile, Purbo and Paschim Laxmiprashad, Chatul, and low-lying areas of Kanaighat upazila went under water. Hundreds of people of Zakiganj upazila were affected.

Companiganj Police Station Officer-in-Charge Sukanta Chakrabarty said the roads of Sadar upazila were inundated.

According to the Water Development Board, water levels continued to rise in the rivers Surma, Kushiara, Sari, Luva, and Dhalai till Wednesday afternoon.

The water level at Surma was flowing above the danger level at Kanaighat and Sylhet points.