Kiartisak Phadwang, director of the Amnart Charoen Irrigation Office, said days of heavy rains have caused water to flow into the Puttha Utthayan reservoir in Mueang district and it is already at full capacity.
He said heavy rains are expected so the authorities have to rush to release the water to free capacity for new rain waters.
As a result, the released water may cause flash flooding downstream, he said.
Meanwhile, Songphan Chansawang, chief agriculture officer of Amnart Charoen, said his office had surveyed flood damage in seven districts and found that 16,665 families in 448 villages in 54 tambon were affected. The flood also damaged 68,200 rai of farmland in the province, he added.