A 30-metre long stretch of three-metre high wall collapsed but no one was injured, Wisit said.
The wall had been partly damaged by the 2011 floods and the recent heavy rains caused the soil to become soft and saturated, which in turn caused the wall to cave into the nearby canal, he said.
Meanwhile, Maj-General Amnuay Chulanonyang, chief of the 24th Military Circle, chaired an event in Udon Thani to prepare military personnel for rescue operations in light of floods from the Mujigae storm front.
He said the storm was expected to hit the upper Issan provinces and his military unit was preparing to carry out rescue operations in Udon Thani, Nong Kai and Nong Bua Lampu.
He said the flood-prone areas were located in mountain areas where flash floods were caused by run-offs and areas along the Mekong river as the level of the river will rise after the storm.