NORTH CAROLINA -- Hurricane Earl steamed toward the Eastern Seaboard on Wednesday as communities from North Carolina to New England kept a close eye on the forecast, worried that even a slight shift in the storm's predicted offshore track could put millions of people in the most densely populated part of the country in harm's way.
Vacationers along North Carolina's dangerously exposed Outer Banks took advantage of the typical picture-perfect day just before a hurricane arrives to pack their cars and flee inland, cutting short their summer just before Labor Day weekend.
The governors of North Carolina, Virginia and Maryland declared states of emergency, sea turtle nests on one beach were scooped up and moved to safety, and the crew of the Navy's USS Cole rushed to get home to Norfolk, Va., on Wednesday ahead of the bad weather. The destroyer was supposed to return later this week from a seven-month assignment fighting piracy off Somalia.
Farther up the East Coast, emergency officials urged people to have disaster plans and supplies ready and weighed whether to order evacuations as they watched the latest maps from the National Hurricane Center - namely, the "cone of uncertainty" showing the broad path the storm could take.
Earl was expected to reach the North Carolina coast late Thursday and wheel to the northeast, staying offshore while making its way up the Eastern Seaboard. But forecasters said it could move in closer, perhaps coming ashore in North Carolina, crossing New York's Long Island and passing over the Boston metropolitan area and Cape Cod.
(Scroll down to watch YouTube videos of Earl in the Caribbean)
That could make the difference between modestly wet and blustery weather on the one hand, and dangerous storm surge, heavy rain and hurricane-force winds on the other.
"Everyone is poised and ready to pull the trigger if Earl turns west, but our hope is that this thing goes out to sea and we're all golfing this weekend," said Peter Judge, a spokesman for the Massachusetts Emergency Management Agency.
As of Wednesday afternoon, Earl was a powerful Category 4 hurricane centered more than 680 miles southeast of Cape Hatteras, North Carolina, with winds of 135 mph.
The storm has already caused at least $150 million in damage from the Virgin Islands to Puerto Rico, cut power to almost 200,000 homes and left 60,000 without clean water, reports CBS News correspondent Kelly Cobiella.
The only evacuations ordered were on Hatteras and Ocracoke Islands on the Outer Banks and low-lying areas of Carteret County to the south. The North Carolina National Guard also is deploying 80 troops to help.
North Carolina's Dare County has ordered 30,000 residents and visitors to leave the Outer Banks' Hatteras Island as Hurricane Earl approaches.
Officials issued the order Wednesday evening for people in seven villages on the island. Only about 4,800 are permanent residents living from Rodanthe to Hatteras. Officials had earlier asked only visitors to leave.
County spokeswoman Dorothy Toolan says people who choose to stay are being advised they may go without government help and services for up to 72 hours after the hurricane passes.
Just a light breeze was stirring and there wasn't a cloud in the sky along the Outer Banks - a ribbon of barrier islands a dozen miles or more off the mainland, connected to the rest of the world by a couple of bridges and a ferry. Along the lone highway, hundreds of cars backed up at one of the bridges.
Brittany Grippaldi and her family took advantage of the good weather to pack up their Ford Explorer in Hatteras and head home to New Jersey.
"It's sad because reality hasn't really set in because it is so beautiful out. It's like, 'Oh, I don't want to leave this,' but it's like the calm before the storm," said Grippaldi, who hoped to beat the traffic.
Chuck Costas also wasn't taking any chances, interrupting his two-week vacation to move inland from the cottage he rented on Nags Head on the Outer Banks. Large waves already crashing ashore uncomfortably close to the home.
"It is what it is," he said. "We have no control over it. If we lose a couple days, it's not a huge loss."
Hurricane warnings were posted for most of the North Carolina coast, with a hurricane watch extending to Delaware and part of Massachusetts.
In Virginia, Gov. Bob McDonnell activated the National Guard and sent 200 troops to the Hampton Roads area on Chesapeake Bay. The area was not expected to get the brunt of Earl, but many remember the surprise fury of Hurricane Isabel, which killed 33 people and caused $1.6 billion in damage in September 2003.
"I'd rather be safe and get our troops and state police in place by Thursday night," the governor said.
Red Cross officials in New York prepared to open as many as 50 shelters on Long Island that could house up to 60,000 people in an emergency. No evacuations were issued, but officials were going to re-examine the situation Thursday morning.
If Earl brings rain farther inland, it could affect the U.S. Open tennis tournament, being played now through Sept. 12 in New York City.
"We're keeping our eye on it very closely," said United States Tennis Association spokesman Chris Widmaier.