Myrtle Beach, Sept 13 (AP) Hurricane Florence put a corridor of more than 10 million people in the crosshairs Wednesday as the monster storm closed in on the Carolinas, uncertainty over its projected path spreading worry across a widening swath of the Southeast.

Faced with new forecasts that showed a more southerly threat, Georgia's governor joined his counterparts in Virginia and North and South Carolina in declaring a state of emergency, and some residents who had thought they were safely out of range boarded up their homes.

The National Hurricane Center's best guess was that Florence would blow ashore as early as Friday afternoon around the North Carolina-South Carolina line, then push its rainy way westward with a potential for catastrophic inland flooding. Florence's nighttime winds were down to 175 kph from a high of 225 kph, and the Category 3 storm fell to a Category 2, with a further slow weakening expected as the storm nears the coast. But authorities warned it will still be an extremely dangerous hurricane.

"Do you want to get hit with a train or do you want to get hit with a cement truck?" said Jeff Byard, an administrator with the Federal Emergency Management Agency.

Tropical storm-force winds extended 315 kilometers from Florence's center, and hurricane-force winds reached out 110 kilometers.

The National Weather Service said 5.25 million people live in areas under hurricane warnings or watches, and 4.9 million live in places covered by tropical storm warnings or watches.

At the White House, President Donald Trump both touted the government's readiness and urged people to get out of the way of Florence.

"Don't play games with it. It's a big one," he said.

As of Tuesday, more than 1.7 million people in the Carolinas and Virginia were warned to clear out. Airlines had cancelled nearly 1,000 flights and counting. Home Depot and Lowe's activated emergency response centers to get generators, trash bags and bottled water to stores before and after the storm. The two hardware chains said they sent in a total of around 1,100 trucks.

Duke Energy, the nation's No. 2 power company, said Florence could knock out electricity to three-quarters of its 4 million customers in the Carolinas, and outages could last for weeks. Workers are being brought in from the Midwest and Florida to help in the storm's aftermath, it said. Boarding up his home in Myrtle Beach, South Carolina, Chris Pennington watched the forecasts and tried to decide when to leave.

"In 12 or 18 hours, they may be saying different things all over again," he said.

Computer models of exactly what the storm might do varied, adding to the uncertainty. In contrast to the hurricane center's official projection, a highly regarded European model had the storm turning southward off the North Carolina coast and coming ashore near the Georgia-South Carolina line. AP

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