NEW ORLEANS (CNN) - Tropical Storm Isaac neared hurricane strength Monday evening, closing on the Gulf Coast with a projected landfall on the anniversary of the devastating Hurricane Katrina.
Isaac was forecast to strike land south of New Orleans early Wednesday, perhaps as a Category 2 hurricane with top winds of about 100 mph. Its projected arrival date would be seven years to the day after the deadly Katrina, leaving much of the Gulf Coast with "a high level of anxiety," as New Orleans Mayor Mitch Landrieu put it Monday.
Residents of low-lying coastal areas from the Florida Panhandle to southeastern Louisiana were ordered to evacuate ahead of storm surges and heavy rain, while Landrieu acknowledged his own jitters due to the coincidence.
Isaac is expected to be weaker than Katrina, which came ashore as a Category 3 hurricane with 125-mph winds. But New Orleans could start to feel tropical storm force winds by midnight Monday, and while Isaac may veer off its currently projected course, "It seems to be settling into a pathway and a speed that is becoming predictable," Landrieu said.
"It is quite ironic that we have a hurricane threatening us on the seventh anniversary of Katrina," he said. But he added that as of Monday afternoon, "There is nothing this storm will bring us that we are not capable of handling."
Most of Katrina's nearly 1,800 deaths occurred when the protective levees around New Orleans failed, flooding the city. But Landrieu said the levees have had $10 billion in improvements since 2005, and the city's pump stations have backup generators ready in case of electrical outages.
Isaac faltered a bit in the Gulf of Mexico as an eye wall that had been forming appeared to break up Monday afternoon, slowing its development, National Hurricane Center Deputy Director Ed Rappaport told CNN. But as of 8 p.m. ET, its top winds remained 70 mph -- just under hurricane strength -- and it was expected to become a hurricane "soon," the Miami-based hurricane center reported.
Isaac was centered about 230 miles (370 kilometers) southeast of the mouth of the Mississippi River, and it was moving to the northwest at 10 mph -- a projected track that brings it ashore early Wednesday morning in the marshes downriver from New Orleans.
But tropical-storm-force winds extended more than 200 miles from the center, and hurricane warnings stretched from Morgan City, Louisiana, to the Alabama-Florida border. Tropical storm warnings extended eastward to Destin, Florida, and westward from Morgan City to Intracoastal City, Louisiana, about 150 miles west of New Orleans.
There was also the potential for a lot of rain, as much as 18 inches in a few areas of Alabama, Louisiana and Mississippi, the hurricane center said. Rainfall totals could approach 20 inches on the eastern Florida peninsula.
As the storm heads north, its rain would benefit some drought-ravaged states like Arkansas, Illinois, Indiana and Missouri.
Landrieu has not ordered an evacuation of his city, most of which is below sea level and protected by a network of levees. But he said he would "strongly urge" about 900 people who live outside the levee system to leave -- and if anyone else is thinking about getting out, "now would be a good time to go."
Others in low-lying Louisiana parishes and in coastal counties and barrier islands of Mississippi, Alabama and northwest Florida were told to clear out ahead of the storm. In Alabama, state Emergency Management Agency Director Art Faulkner warned that strong winds and high water may affect the Mobile area even if the storm hits as far west as Louisiana.
"It is a very large storm," Faulkner said. "And oftentimes we confuse and focus on a specific dot that may be identified as the center of the storm when very dangerous conditions may exist as far as 200 miles from that specific dot."
The storm lashed Cuba and the Florida Keys over the weekend after slamming into Haiti, where at least 19 people had been reported dead by Monday, the country's civil protection agency reported.
The Hurricane Center projected storm surges of 3 to 6 feet for the Florida Panhandle, 6 to 9 feet for the Alabama coast and 6 to 12 feet for the Mississippi and southeastern Louisiana shores.
In Bay St. Louis, Mississippi, Hancock County authorities ordered residents of low-lying areas to evacuate Monday evening. The National Park Service had already ordered visitors to leave the barrier islands off the Mississippi coast.
Jackson County, which includes the coastal cities of Pascagoula, Gautier and Ocean Springs, ordered evacuations for anyone living south of U.S. Highway 90 -- a major artery along the Mississippi coast -- or for those living in mobile homes, along rivers and in other vulnerable areas.
"Those residents that experienced flooding during Hurricane Katrina should evaluate what the effects of the possible 8-12 foot tidal surge would have to their property and make an informed decision with regard to evacuation,"








