St. Tammany Parish officials have proclaimed a 6 p.m. to 6 a.m. curfew because of Tropical Storm Isaac.
Parish President Pat Brister says up to a foot of water had been forced out of Lake Pontchartrain and was flooding streets along the Mandeville lakefront.
Some flooding also was reported in Madisonville and Lacombe. Sheriff's Office rescue trucks went to Indian Village, a community of about 200 homes outside levees in eastern St. Tammany — where the Pearl River was rising. Sheriff's spokesman George Bonnet says a deputy told him that although some houses were still dry he walked through neck-deep water in other spots.
The 24-mile-long Lake Pontchartrain Causeway, which connects Mandeville on the north shore with Metairie in Jefferson Parish, to the south, was closed because of high winds.