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Water rises around a home on the Jourdan River as Hurricane Isaac passes through Kiln, Mississippi, August 29, 2012. REUTERS/Michael Spooneybarger
Isaac was downgraded to a tropical depression on Thursday and is moving into the central United States.
It left little damage in New Orleans, where stronger barriers were installed after Hurricane Katrina in 2005 but leaving large areas of the region flooded.
A report says that seven tornadoes have spun off from Isaac in Mississippi and Alabama.
A tornado that touched down in Gulfport, Mississippi had caused significant destruction to homes.
Now, there is a potential failure of Lake Tangipahoa Dam in Mississippi’s Percy Quin State Park.
Authorities ordered the immediate evacuation of tens of thousands of residents in nearby communities in Louisiana and Mississippi as a protective measure if the dam burst flooded the areas.
A sherriff’s vehicle sits in flood waters caused by Isaac, Thursday, Aug. 30, 2012, north of LaPlace, La, off Lake Pontchartrain. Isaac’s maximum sustained winds had decreased to 45 mph and the National Hurricane Center said it was expected to become a tropical depression by Thursday night. The storm’s center was on track to cross Arkansas on Friday and southern Missouri on Friday night, spreading rain as it goes. (AP Photo/Eric Gay)
Carlo Maltese and his dog Pin ride in a boat after being rescued from his flooded home as Hurricane Isaac hits Wednesday, Aug. 29, 2012, in Braithwaite, La. (AP Photo/David J. Phillip)
A rescue boat passes a partially submerged stop sign during Hurricane Isaac on August 29, in Braithwaite, Louisiana. Hurricane Isaac pounded New Orleans with fierce winds and torrents of rain, but the multi-billion-dollar flood defenses built after Katrina swamped the city seven years ago held firm. (AFP Photo/Mario Tama)
The Mississippi Army National Guard keeps people off the streets during curfew along Beach Blvd. as Hurricane Isaac passes through Gulfport, Mississippi, August 29, 2012. The slow-moving but powerful Category 1 hurricane was felt along the Gulf Coast, threatening to flood towns in Mississippi and Louisiana with storm surges of up to 12 feet (3.7 meters) and top sustained winds up to 75 miles per hour (120 kilometers per hour). REUTERS/Michael Spooneybarger
Boats are battered in the harbor as Hurricane Isaac passes through Pass Christian, Mississippi, August 29, 2012. REUTERS/Michael Spooneybarger
A man and a woman walk through flood waters on St. Roch ave. as Hurricane Isaac makes land fall in New Orleans, Louisiana August 29, 2012. The two were trying to reach a local gas station to retrieve supplies. REUTERS/Sean Gardner
Rescue workers transport residents trapped by rising water from Hurricane Isaac in the River Forest subdivision on August 29, 2012 in LaPlace, Louisiana. The large Level 1 hurricane slowly moved across southeast Louisiana, dumping huge amounts of rain and knocking out power to Louisianans in scattered parts of the state. (Photo by Chris Graythen/Getty Images)
Joel Geiger holds his son Jarren Geiger, 4, while surveying the damage in the Olde Towne area after Hurricane Isaac passed through Slidell, Louisiana, August 30, 2012. REUTERS/Michael Spooneybarger
Residents of Mandeville walk through a flooded street as Hurricane Isaac passes through Mandeville, Louisiana, August 30, 2012. REUTERS/Jonathan Bachman
Christine Hopson boards a National Guard truck with family members after their home was flooded in Hurricane Isaac in La Place, Louisiana August 30, 2012. REUTERS/Lee Celano
10-year-olds Joshua Keegan (L) and Ruffin Henry (C) play with Scout in a flooded area outside of the levee system along the shores of Lake Pontchartrain as Hurricane Isaac approaches New Orleans, Louisiana August 28, 2012. REUTERS/Jonathan Bachman
Hurricane Isaac crashed ashore in southeast Louisiana on Tuesday, bringing high winds and heavy rain.
Nearly 70,000 people in Louisiana were without electricity.
On Tuesday, some parts of Louisiana’s low-lying Plaquemines Parish were already flooded.
The effects of the large, slow moving storm have already been felt along the coast lines of Louisiana, Mississippi and Alabama.
Large storm surge caused flood in Louisiana and winds gusted to 99.7793 kilometers per hour (62 miles per hour) in New Orleans.
On Tuesday morning, engineers closed the new floodgate at Lake Borgne, east of New Orleans, for the first time.
It is largest storm-surge barrier in the world.
Hurricane Isaac is predicted to hit New Orleans almost exactly seven years after Hurricane Katrina hit New Orleans on August 29, 2005 killing more than 1,800 people and causing billions of dollars of damage.
People were urged to leave the low-lying areas in Mississippi, Alabama and Louisiana because the hurricane could flood towns and cities in, with a storm surge of up to 12 feet high!
Before turning into a hurricane, Tropical Storm Issac had already killed at least 23 people in Haiti and the Dominican Republic.
Residents gather to watch the ocean’s surf as Hurricane Isaac approaches Gulfport, Mississippi, August 28, 2012. REUTERS/Michael Spooneybarger
L’Rena Anderson leans into the wind as she walks along the beach on Okaloosa Island in Fort Walton Beach, Fla., Tuesday, Aug. 28, 2012. Anderson was among many local residents who turned out to watch the effects of Hurricane Isaac as it churns through the Gulf of Mexico toward an expected landfall in Louisiana. (AP Photo/Northwest Florida Daily News, Devon Ravine)
An unidentified Okaloosa County Deputy Sheriff stands next to the Jetty East condominium in Destin, Fla., Tuesday, Aug. 28, 2012 as a wave crashes over the buildings boardwalk. Although Isaac is expected to make landfall in Louisiana, the storm still pounded shorelines along Northwest Florida as it moved through the Gulf of Mexico. (AP Photo/Northwest Florida Daily News, Devon Ravine)
A man runs back from the end of a jetty as waves whipped up by Tropical Storm Isaac crash around him in Bal Harbour, Fla. Forecasters predicted Isaac would intensify into a Category 1 hurricane later Monday or Tuesday with top sustained winds of between 74 and 95 mph. The center of its projected path took Isaac directly toward New Orleans on Wednesday, but hurricane warnings extended across some 330 miles from Morgan City, La., to Destin, Fla. It could become the first hurricane to hit the Gulf Coast since 2008. (AP Photo/Wilfredo Lee)