NEW BERN, NC — The Marines, the Coast Guard, civilian crews and volunteers used helicopters, boats and heavy-duty vehicles Saturday to rescue hundreds of people trapped by Florence's shoreline onslaught, even as North Carolina braced for what could be the next stage of the disaster: widespread, catastrophic flooding inland.

The death toll from the hurricane-turned-tropical storm climbed to 11.

A day after blowing ashore with 90 mph (145 kph) winds, Florence practically parked itself over land all day long and poured on the rain. With rivers rising toward record levels, thousands of people were ordered to evacuate for fear the next few days could bring the most destructive round of flooding in North Carolina history.

More than 2 feet (60 centimeters) of rain had fallen in places, and the drenching went on and on, with forecasters saying there could be an additional 45 centimeters by the end of the weekend.

"I cannot overstate it: Floodwaters are rising, and if you aren't watching for them, you are risking your life," Gov. Roy Cooper said.

As of 5 pm, Florence was centered about 60 miles (95 kilometers) west of Myrtle Beach, South Carolina, inching west at 2 mph (4 kph) — not even as fast as a person walking. Its winds were down to 45 mph (75 kph). With half of the storm still out over the Atlantic, Florence continued to collect warm ocean water and dump it on land.

In its initial onslaught along the coast, Florence buckled buildings, deluged entire communities and knocked out power to more than 900,000 homes and businesses. But the storm was shaping up as a two-part disaster, with the second, delayed stage triggered by rainwater working its way into rivers and streams.

The flash flooding could devastate communities and endanger dams, roads and bridges.