An estimated 80 percent of New Orleans was under water, up to 20 feet deep in places, with miles and miles of homes swamped.
Breaches in at least two levees allowed water from Lake Pontchartrain to inundate sections of New Orleans.
The Coast Guard said it has rescued 1,200 people by boat and air. New Orleans Mayor Ray Nagin said hundreds, if not thousands, of people may still be stuck on roofs and in attics.
Unknown number of deaths.
At least 370,000 customers estimated without power in southeast Louisiana; number expected to rise. New Orleans water unsafe to drink without boiling.
Entire city of New Orleans, city of 485,000, ordered evacuated before storm struck. Mayor estimated 80 percent of the city's residents fled.
Thousands to be evacuated from the Louisiana Superdome over the next few days as floodwaters rise.
New Orleans police made several arrests for looting. About 120 armed National Guardsmen were assigned to the French Quarter.
Deaths: At least 100 in HarrisonCounty, home to Biloxi and Gulfport.
At least 900,000 customers statewide without power, utilities said.
Many casinos that dot the coast were damaged or destroyed. Emergency officials had reports of water reaching the third floors of some of the barge-mounted casinos.
More than 1,600 Mississippi National Guardsmen activated.
Storm swept sailboats onto city streets in Gulfport and obliterated hundreds of waterfront homes, businesses, community landmarks and condominiums.
A foot of water swamped the emergency operations center at HancockCounty courthouse, which sits 30 feet above sea level, and the back of the courthouse collapsed.
About 718,000 homes and businesses without power.
Flooding reached 11 feet in Mobile, matching record set in 1917, according to National Weather Service. Water up to roofs of cars in downtown Mobile and bayou communities. Piers ransacked and grand homes flooded along Eastern Shore of Mobile Bay.
Major bridge over the MobileRiver remained closed; it was struck by an oil drilling platform that floated away from a shipyard.
Deaths: At least two as the remnants of Katrina sliced through the state, spawning tornados. Multiple injuries and dozens of buildings leveled.
Deaths: 11, according to state tally on South Florida strike last week.
38,000 customers without power late Tuesday in the Panhandle, hit by eastern edge of storm Monday. In South Florida, 136,300 customers still without power Tuesday.
President Bush will cut short his Texas vacation to return to Washington on Wednesday, two days earlier than planned.
The Federal Emergency Management Agency sent medical teams, rescue squads and groups prepared to supply food and water into the disaster areas.
The Navy sent four ships to the GulfCoast with water and other supplies.
The remnants of Hurricane Katrina spawned scattered rains and a potential tornado that damaged 13 homes in the small Ada community near Marshall.
Energy prices hit new highs, with crude futures briefly topping $70 a barrel and wholesale gasoline costs surging to levels that could lead to $3 a gallon at the pump in some markets.
Oil and gas companies surveyed the Gulf of Mexico, finding oil rigs as far as 17 miles from their original locations and water where drilling infrastructure once stood.
Saturday, July 26 2014 2:09 PM EDT2014-07-26 18:09:07 GMT
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