Tropical Storm Isaac gains steam

Kevin Johnson clears debris for a client in the French Quarter in preparation for Hurricane Isaac, Aug. 28, 2012 in New Orleans, Louisiana. New Orleans is bracing for the approach of Hurricane Isaac, now a Category 1 storm, which is predicted to hit the city on August 29, the seventh anniversary of Hurricane Katrina.

Louisiana National Guard Troops prepare for Hurricane Isaac outside the Superdome in New Orleans, where many residents took refuge during Hurricane Katrina seven years ago, Aug. 28, 2012.

Louisiana National Guard Troops prepare for Hurricane Isaac outside the New Orleans convention center, Aug. 28, 2012.

Louisiana National Guard Troops prepare for Hurricane Isaac on Canal Street in New Orleans, Aug. 28, 2012.

The Lower Ninth Ward district of New Orleans is seen as Hurricane Isaac approaches, Aug. 28, 2012.

The Lower Ninth Ward district of New Orleans is seen as Hurricane Isaac approaches, Aug. 28, 2012. Seven years after Hurricane Katrina, residents of the Lower Ninth describe it as looking like a "jungle," and feel forgotten.

A swelling inlet of the Mississippi River is seen along a levee that protects New Orleans' Lower Ninth Ward, as Hurricane Isaac approaches, Aug. 28, 2012.

The Lower Ninth Ward district of New Orleans is seen as Hurricane Isaac approaches, Aug. 28, 2012.

Businesses prepare for the arrival of Hurricane Isaac in the French Quarter of New Orleans, Aug. 28, 2012.

George Julien rests after shopping in a boarded-up store that remained open on Canal Street in New Orleans Aug. 28, 2012, as Hurricane Isaac beared down on the city.

Sandbags protect a storefront on Canal Street in preparation for Hurricane Isaac on Aug. 28, 2012, in New Orleans, La.

AP Photo/Tampa Bay Times, James Borchuck

Michael Harper walks along the sea wall at Spa Beach in St. Petersburg, Fla., Aug. 27, 2012. He was out jogging and stopped to look at the giant waves being kicked up by Tropical Storm Isaac.

A Monroe County worker collects downed Sea Grape trees after Tropical Storm Isaac moved through the Florida Keys on August 27, 2012 in Key West, Florida.

A resident walks along Bayshore Boulevard in-between squalls blowing across the bay in Tampa, Fla., Monday, Aug. 27, 2012.

A downed tree sits in the water after Isaac moved through the Florida Keys on Aug. 27, 2012, in Key West, Florida.

Waves pound the boardwalk, the Malecon, during the passing of Tropical Storm Isaac, in Havana, Cuba, Aug. 26, 2012.

Lifeguard Duane Gonzalez takes down the red warning flag on a beach in Tampa, Fla., Aug. 26, 2012.

Heavy storm clouds hover over the skyline of downtown Miami as Tropical Storm Isaac's weather bands reach the area, Aug. 26, 2012.

Joel Jimenez, right, and Issac Page remove an awning outside the Tampa Convention Center which serves as the media center for the Republican National Convention in Tampa, Fla., Aug. 26, 2012.

A person braves the rain in Key West — AP Photo/The Miami Herald, Walter Micho

A person braves the rain at Clarence Higgs Beach in Key West, Fla., as Tropical Storm Isaac hits the area on, Aug. 26, 2012.

A van passes along a road that gave way on the way to Jacmel, Haiti, a day after Tropical Storm Isaac brought rains and winds across the nation, Aug. 26, 2012.

A man walks on the beach in Key West, Fla., Aug. 26, 2012 as heavy winds hit the northern coast from Tropical Storm Isaac.

People react as they survey the damage in Jacmel, Haiti, a day after Tropical Storm Isaac brought rains and winds across the nation, Aug. 26, 2012. At least 19 people were killed in Haiti (including many in tent cities filled with earthquake victims), and five others in the Dominican Republic.

People ride motorbikes in a flooded street in Havana on Aug. 26, 2012, following the passage of Tropical Storm Isaac.

Waves batter Havana's seafront on Aug. 26, 2012, following the passing of Tropical Storm Isaac.

People ride bikes as as Tropical Storm Isaac begins to move ashore on Aug. 26, 2012, in Marathon, Florida.

People venture out into the storm as Tropical Storm Isaac begins to move ashore on Aug. 26, 2012, in Marathon, Florida.

Cars leave the Lower Keys on Aug. 25, 2012 in Key West, Florida.

View of waves in Gibara, Holguin province, Cuba on Aug. 25, 2012, during Tropical Storm Isaac.

Arthur Asti installs storm shutters on Aug. 25, 2012 in Key West, Florida.

Local residents stay under the rain at the seafront of Enriquillo — Getty Images/Erika SanteIcis

Local residents are drenched at the seafront of Enriquillo, southwestern Dominican Republic, Aug. 24, 2012.

Local residents walk under the rain along a street of Enriquillo, southwestern Dominican Republic, Aug. 24, 2012.

Lowes employees load plywood — AP Photo/Northwest Florida Daily News, Nick Tomecek

Lowes employees, Robert Tucker, right, and John Lucenti load plywood for Terry King, back, and Ofelia Murphy at Lowes in Fort Walton Beach, Fla., Aug. 25, 2012.

A man stands on a post with a stop sign as waves pass the seawall during the passage of Tropical Storm Isaac in Baracoa, Cuba, Aug. 25, 2012.

Residents of Cite Soleil wade through floodwaters — AP Photo/The Miami Herald, Patrick Farrell

Residents of Cite Soleil, Haiti, wade through floodwaters on Route Neuf from Tropical Storm Isaac, Aug. 25, 2012.

People walk thru flooded streets after Tropical Storm Isaac hit in Barahona, Dominican Republic, Aug. 25, 2012.

A home is left in ruins — AP Photo/Ramon Espinosa

A home that was built twice within the last two years is left in ruins during the passage of Tropical Storm Isaac near the seawall in Baracoa, Cuba, Aug. 25, 2012.

Shira Edllan Gervasi puts her name on plywood protecting a storefront in Key West — AP Photo/Alan Diaz

Shira Edllan Gervasi, of Israel, puts her name on plywood protecting a storefront in Key West, Fla., in anticipation of Tropical Storm Isaac, Aug. 25, 2012.