KEY WEST, Fla. — Tropical Storm Isaac barely stirred Florida Keys residents from their fabled nonchalance Sunday, while the Gulf Coast braced for the possibility that the sprawling storm will strengthen into a dangerous hurricane by the time it makes landfall there.
It was on course to strike land on the seventh anniversary of Hurricane Katrina, a powerful storm that crippled New Orleans and the Gulf Coast. Forecasters expected Isaac to pass the Keys late Sunday before turning northwest and striking as a Category 2 hurricane somewhere between New Orleans and the Florida Panhandle on Wednesday.
The National Hurricane Center issued a hurricane warning for a large swath of the northern Gulf Coast, including New Orleans.
Louisiana Gov. Bobby Jindal called a state of emergency and suggested that people begin leaving low-lying parts of the state.
An emergency declaration was also issued in Mississippi by Gov. Phil Bryant amid concerns of storm surge threatening low-lying areas. Oil companies began evacuating workers from offshore oil rigs and cutting production in advance of Isaac.
The storm was on a course to pass west of Tampa, but it had already disrupted the Republicans' schedule there because of the likelihood of heavy rain and strong winds that extended more than 200 miles from its center.
Even before reaching hurricane strength, Isaac caused considerable inconvenience, with more than 550 flights canceled at Miami International Airport and about 150 from Fort Lauderdale's airport. There were scattered power outages from Key West to Fort Lauderdale affecting more than 16,000 customers, and flooding occurred in low-lying areas.
Gov. Rick Scott said that only minor damage was reported from Isaac.
Hurricane center forecasters are uncertain of the storm's path because two of their best computer models now track the storm on opposite sides of a broad cone. One model has Isaac going well west and the other well east. For the moment, the predicted track goes up the middle.
Before reaching Florida, Isaac was blamed for eight deaths in Haiti and two more in the Dominican Republic, and downed trees and power lines in Cuba.