Isolated tornadoes were possible over parts of southern Louisiana and the upper Texas coast later Monday, according to the hurricane center. Rainfall of 2 to 4 inches was expected in coastal Louisiana and southeast Texas, with isolated amounts up to 6 inches in Texas. Tides of 2 to 4 feet above normal levels were expected in parts of the warning area.

In Louisiana's Terrebonne Parish, emergency director Jerry Richard said he had called in staff members to determine if the parish's low-lying areas could be affected by flooding.

They planned to monitor the storm through Sunday night.

Clifton Hebert of the Cameron Parish emergency preparedness office said they are monitoring Edouard on a 24-hour basis and will be sending regular releases to the public.

"Right now, we want residents in travel trailers to have a more permanent residence to go to if necessary," Hebert said.

He also said they expected a high tide four to five feet about average.

"If people see water in the roadway, they should not drive through because it would probably be saltwater and damage their vehicle," Hebert said.

State emergency officials did not immediately return calls seeking details on emergency plans.

Many of the Gulf's offshore oil and natural gas drilling platforms sit in the storm's path.

Shell Oil Co. had not made any operational changes Sunday afternoon, but company officials were watching the storm closely, spokesman Shawn Wiggins said.

ExxonMobil Corp. had not evacuated any workers or cut production by Sunday evening, but the company was preparing its platforms for heavy wind and rain and considering whether to evacuate some workers, spokeswoman Margaret Ross said in an e-mail statement.