The State Minister for Transport and Works, Richard Azan, says preliminary estimates of the damage caused by the weekend rains in Port Maria, St Mary is $560 million.
Azan who is leading a technical team on a tour into the area, says he expects the final figure to be higher.
On Saturday, the St. Mary capital and several other communities were flooded as a stationary front produced heavy rainfall.
The residents have complained that the failure of the authorities to clean the drains have contributed to the problem.
Azan says he has given the team instructions to clean all drains.
But he says this will put a further strain on the money already budgeted to help areas affected by Sandy.