Hurricane Isaac

John Moore/Getty Images

NEW ORLEANS, LA - AUGUST 29: A pedestrian walks through the rain of Hurricane Isaac on August 29, 2012 in New Orleans, Louisiana. The Level 1 hurricane moved slowly across Louisiana, dumping large amounts of rain and knocking out power to half a million Louisianans around the state.

Hurricane Isaac

FREDERIC J. BROWN/AFP/GettyImages

A fallen tree blocks a road in New Orleans, Louisiana on August 29, 2012, as Hurricane Isaac battered the city and surrounding region, flooding homes and driving stormy waters over the top of at least one levee, seven years to the day after Katrina devastated the city. Packing vicious winds of 80 miles (130 kilometers) per hour and rolling slowly over Louisiana, Isaac has dumped huge quantities of rain on the renowned US jazz city as residents cowered in their homes.

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

FREDERIC J. BROWN/AFP/GettyImages

A car drives beneath a fallen streetlight along deserted streets in New Orleans, Louisiana on August 29, 2012 as Hurricane Isaac battered the city and surrounding region, flooding homes and driving stormy waters over the top of at least one levee, seven years to the day after Katrina devastated the city. Packing vicious winds of 80 miles (130 kilometers) per hour and rolling slowly over Louisiana, Isaac has dumped huge quantities of rain on the renowned US jazz city as residents cowered in their homes.

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

FREDERIC J. BROWN/AFP/GettyImages

Evan Stoudt faces strong winds while visiting the banks of Lake Pontchartrain in New Orleans on August 28, 2012 in Louisiana, where Hurricane Isaac has made landfall. The US National Hurricane Center said a "dangerous storm surge" was occurring along the northern Gulf Coast with storm surges of up to eight feet (2.4 meters) already being reported in Louisiana, Mississippi and Florida. States of emergency have been declared in Louisiana and Mississippi, allowing authorities to coordinate disaster relief and seek emergency federal funds.

Hurricane Isaac

FREDERIC J. BROWN/AFP/GettyImages

An uprooted and fallen tree is positioned in front of a house in New Orleans, Louisiana on August 29, 2012, as Hurricane Isaac battered the city and surrounding region, flooding homes and driving stormy waters over the top of at least one levee, seven years to the day after Katrina devastated the city. Packing vicious winds of 80 miles (130 kilometers) per hour and rolling slowly over Louisiana, Isaac has dumped huge quantities of rain on the renowned US jazz city as residents cowered in their homes.

Hurricane Isaac

Mario Tama/Getty Images

NEW ORLEANS, LA - AUGUST 29: A tree is blown over outside Tulane Medical Center during rains from Hurricane Isaac on August 29, 2012 in New Orleans, 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.

Hurricane Isaac

Mario Tama/Getty Images

BRAITHWAITE, LA - AUGUST 29: People rest in a rescue truck atop a levee next to floodwaters after being rescued in Plaquemines Parish on August 29, 2012 in Braithwaite, Louisiana. Dozens were reportedly rescued in the area after levees were overtopped by floodwaters from Hurricane Isaac. Today is the seventh anniversary of Hurricane Katrina.

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Hurricane Isaac

Mario Tama/Getty Images

BRAITHWAITE, LA - AUGUST 29: Rescue workers look out at floodwaters from a levee on August 29, 2012 in Braithwaite, Louisiana. Dozens were reportedly rescued in the area in Plaquemines Parish after levees were overtopped by floodwaters from Hurricane Isaac.

Hurricane Isaac

FREDERIC J. BROWN/AFP/GettyImages

A fallen streetlight sits in a puddle of water in downtown New Orleans, Louisiana on August 29, 2012, as Hurricane Isaac battered the city and surrounding region, flooding homes and driving stormy waters over the top of at least one levee, seven years to the day after Katrina devastated the city. Packing vicious winds of 80 miles (130 kilometers) per hour and rolling slowly over Louisiana, Isaac has dumped huge quantities of rain on the renowned US jazz city as residents cowered in their homes.

Hurricane Isaac

John Moore/Getty Images

NEW ORLEANS, LA - AUGUST 29: A man walks his dog as rain from Hurricane Isaac falls over Bourbon Street on August 29, 2012 in New Orleans, Louisiana. The Category 1 hurricane is slowly moving across southeast Louisiana, dumping large amounts of rain and knocking out power to Louisianans in scattered parts of the state.

Hurricane Isaac

Chris Graythen/Getty Images

NEW ORLEANS, LA - AUGUST 28: A man crouches behind a sign to avoid the high winds on Lake Pontchartrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana. Hurricane Isaac is expected to make landfall later today along the Lousiana coast.

Hurricane Isaac

Chris Graythen/Getty Images

NEW ORLEANS, LA - AUGUST 28: A group of men sit on a bench at the edge of Lake Pontchartrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana. Hurricane Isaac is expected to make landfall later today along the Lousiana coast.

Hurricane Isaac

Chris Graythen/Getty Images

NEW ORLEANS, LA - AUGUST 28: A man walks through the flood waters near Lake Pontchartrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana. Hurricane Isaac is expected to make landfall later today along the Lousiana coast.

Hurricane Isaac

Chris Graythen/Getty Images

NEW ORLEANS, LA - AUGUST 28: A man stands in the high winds on the edge of Lake Pontchartrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana. Hurricane Isaac is expected to make landfall later today along the Lousiana coast.

Hurricane Isaac

Chris Graythen/Getty Images

NEW ORLEANS, LA - AUGUST 28: Joshua Keegan and Ruffin Henry swim in water coming ashore from Lake Pontchartrain as Hurricane Isaac approaches on August 28, 2012 in New Orleans, Louisiana. Hurricane Isaac is expected to make landfall later today along the Lousiana coast.

Hurricane Isaac

NASA via Getty Images

AT SEA - AUGUST 28: In this handout satellite image provided by NASA, Hurricane Isaac moves in the Gulf of Mexico toward the Gulf Coast on August 28, 2012 in the Atlantic Ocean. According to reports, Isaac, a Category 1 hurricane, is expected to make landfall on Gulf Coast near New Orleans on August 29, the seven-year anniversary of Hurricane Katrina.