Precautionary measures will also be taken as there is a fear of more landslides in the area, the official added.
There are now more than 80,000 people sheltering at evacuation sites across the country, according to the UN Office for the Coordination of Humanitarian Affairs (OCHA).
The death toll from the monsoon landslide has risen to 59 in Myanmar's Mon state as of Monday, according to the Myanmar Fire Services Department.
In the town of Shwegyin in eastern Bago region, residents waded out through waist-deep waters or waited to be rescued by boat after the Sittaung river burst its banks, swallowing entire homes.
Heavy rains pounded other parts of Mon, Karen and Kachin states, flooding roads, destroying bridges and forcing people to flee by boat.
As the rainy season reaches its peak, the country's armed forces are pitching in.
"Our regional military commands are working to help with the search and rescue process in disaster areas", Brigadier General Zaw Min Tun said.
On Sunday, rescue efforts were hampered as rains continued to lash the region.
"We are still ok, but the situation is worsening over time", he said by phone on Sunday night. "We will continue searching in the coming days as well", Paung township administrator Zaw Moe Aung said.
The U.N. Office for the Coordination of Humanitarian Affairs said that monsoon flooding had displaced more than 7,000 people last week in Monday state.
"I dragged a woman and two children from a auto but I could not reach two other people, so I had to leave them", the 30-year-old said.
Vice President Henry Van Thio visited landslide survivors in a Paung township village on Saturday and "spoke of his sorrow" while promising relief, the paper reported.
That year more than 100 people died in floods that also displaced hundreds of thousands.