West Pearl River in Louisiana expected to flood as Hurricane Isaac recedes


Joshua Keegan and his dog Scout swim in the rising water of Lake Pontchatrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana.


Chris Graythen

West Pearl River in Louisiana's St. Tammany parish is being threatened with flooding, even as Hurricane Isaac weakens and an evacuation order was lifted in the region. 

St. Tammany Parish President Pat Brister said the Pearl River is expected to crest to 19.5 feet, five feet over flood stage, and warned residents to be prepared to evacuate if necessary. 

"It's going to be a long couple of days,'' Brister told the Times-Picayune

The region is still reeling from Hurricane Isaac, which left much of the area southeast of New Orleans flooded and thousands of residents without power, CBS News reported

Most of the areas heavily damaged by Isaac were outside the levee system that was reconstructed with $14.5 billion of federal dollars after the devastating Hurricane Katrina, which left 1,800 dead.

More from GlobalPost: Louisiana's flood waters recede, causing threats elsewhere

More than 3,500 Louisiana residents were in shelters across the state on Sunday, Governor Bobby Jindal's office told CNN

Obama is set to visit the region Monday, a day before the Democratic National Convention kicks off in Charlotte, North Carolina. He will meet with officials, tour storm damage, and speak to reporters before returning to North Carolina, CBS News reported. 

Janet Napolitano, Homeland Security Secretary, visited Slidell, Louisiana on Sunday.

"We are part of a team to make sure Hurricane Isaac is put to rest as soon as we can for all those affected," Napolitano said. "In the meantime, please know all of us are thinking about those in Louisiana who are without their homes or without their businesses."

More from GlobalPost: DNC 2012: The lull before the storm