About 12,000 hectares of boro paddy fields in Itna and Mithamoin upazilas in Kishoreganj were flooded when water from nearby lakes and rivers breached some 20 small and large dams.
An additional 50 haors, or wetlands, where boro is being cultivated are under the risk of flooding.
Sadekur Rahman, a farmer, said crops in 2,800 hectares of land in Daki, Charigram, Phulpur and Kanchanpur areas were inundated as the water level in Daira and Duvi Rivers rose significantly.
“Though farmers are trying to protect their crops by making embankments, it will be of little use if the water level increases,” he said.
The worst affected areas are Joysingi, Alongjuri, Danpur, Mriga and the upazila sadar.
Eighty hectares of cropland went underwater as the Rangamatia Canal embankment in Sutar Para in Karimganj upazila developed cracks in several areas.
Najim Uddin of Chatalpur village said he lost all of his 4.8 hectares of boro paddy in the flooding. Farmers across the district are repairing the dams themselves and even patrolling at night to detect breaches.
Abdul Awal, who farms in the Chilni haor, said: "Water in the Namakara River is increasing so much that if the dam breaks, 6,000 acres of boro harvest will go underwater."
Mahmudur Rahman, a social worker of Itna upazila said: "Six thousand hectares of paddy in this upazila washed away in this untimely flood. Boro is the only harvest these lowlands have."
“Local farmers will starve if their harvests wash away,” he added. “They will have to live on borrowed money.” Mahmudur pointed out the lack of government initiative to help farmers affected by such floods in the haors.
Mithamoin Upazila Parishad chairman Kamrul Ahsan Shahjahan said: “More than 5000 hectares of harvest went underwater in my upazila.”
M Rafiqul Islam, an official of the Department of Agricultural Extension, dismissed the fears of crop damage. "The situation is not so serious. It will not hamper the achievement of the boro production target," he said.
Deputy Commissioner Md Siddiqur Rahman and district agriculture extension officer recently visited different areas of the haor region. Siddiqur said: "I visited the areas. A lot of lands have been damaged by the early onrush of water. The Upazila Nirbahi Officers have been asked to remain alert and take proper steps."