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Isaac becoming hurricane near US coast

NEW ORLEANS — Isaac was on the verge of becoming a full-blown hurricane Tuesday morning as it rolled over the Gulf of Mexico toward Louisiana, where residents in four states left boarded-up homes for inland shelter and New Orleans waited behind flood-defense levees strengthened after the devastating Katrina struck exactly seven years ago.

Forecasters predicted the tropical storm would power up to hurricane strength, which starts at winds of 74 mph (119 kph), later in the day and become at least a Category 1 hurricane by the time it reaches the swampy coast of southeast Louisiana early Wednesday.

The focus has been on New Orleans as the massive, slow-moving storm takes dead aim at the city, but the impact will be felt well beyond the city limits, especially in expected flooding in Louisiana, Mississippi, Alabama and the Florida Panhandle. The storm’s winds could be felt more than 200 miles (320 kilometers) from the storm’s center.

Early Tuesday, Isaac was a large and potent tropical storm with top sustained winds of 70 mph (113 kph). The storm system was centered about 105 miles (168 kilometers) south-southeast of the mouth of the Mississippi River just before 8 a.m. EDT (1200 GMT) and moving northwest at 7 mph (11.26 kph), according to the National Hurricane Center in Miami.

Although Isaac’s approach on the eve of the Katrina anniversary invited obvious comparisons, the storm is nowhere near as powerful as Katrina was when it struck on Aug. 29, 2005. Katrina at one point reached Category 5 status, with winds of more than 157 mph (252 kph), and made landfall as a Category 3 storm.

Mayor Mitch Landrieu did not activate a mandatory evacuation. Instead, officials urged residents to hunker down and make do with the supplies they had.

Federal officials said the updated levees around New Orleans are equipped to handle storms stronger than Isaac. The Army Corps of Engineers was given about $14 billion to improve flood defenses, and most of the work has been completed.

But anxiety was high, especially in the city’s Lower 9^th Ward, wiped out by Katrina after floodwalls burst and let the waters rush in.

“I don’t really trust the levees,” said Robert Washington, who planned to evacuate along with his wife and five children. “I don’t want to take that chance. I saw how it looked after Katrina back here.”

His neighborhood, just a few blocks from where the floodwall protecting the Lower 9^th Ward broke open, remains largely empty.

Forecasters at the National Hurricane Center warned that Isaac, especially if it strikes at high tide, could cause storm surges of up to 12 feet (3.6 meters) along the coasts of southeast Louisiana and Mississippi and up to 6 feet (1.8 meters) as far away as the Florida Panhandle..

Isaac left 24 dead in Haiti and the Dominican Republic but left little damage in the Florida Keys as it blew past. It also delayed the planned Monday start of the Republican National Convention.

States of emergency were in effect in Louisiana, Mississippi, Alabama and Florida.

The approaching storm was already deeply woven into political concerns beyond the Republican convention. The slow response to Katrina, which killed 1,800 and left New Orleans in chaos, led to severe criticism of then-President George W. Bush’s Republican administration. This time, both President Barack Obama and Republican challenger Mitt Romney are cautious about the impressions made.

Obama on Monday asked the Federal Emergency Management Agency to coordinate disaster relief efforts with state and local officials along the Gulf Coast. But Louisiana Gov. Bobby Jindal, a Republican, shot back late Monday in a letter to the Obama administration that the declaration fell short of the help he was requesting.

The White House did not respond immediately to requests for comment on Jindal’s letter.