The Latest: Hurricane Florence slightly increases in speed

Walker Townsend, at right, from the Isle of Palms, S.C., fills a sand bag while Dalton Trout, in center, holds the bag at the Isle of Palms municipal

Walker Townsend, at right, from the Isle of Palms, S.C., fills a sand bag while Dalton Trout, in center, holds the bag at the Isle of Palms municipal

Kevin Orth loads sandbags into cars on Milford Street as he helps residents prepare for Hurricane Florence, Monday, Sept. 10, 2018, in Charleston, S.C

Kevin Orth loads sandbags into cars on Milford Street as he helps residents prepare for Hurricane Florence, Monday, Sept. 10, 2018, in Charleston, S.C

Mike Herring with Frank's Ice Company unloads another pallet of ice as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington,

Mike Herring with Frank's Ice Company unloads another pallet of ice as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington,

People shop at the Harris Teeter, filling up on water and supplies as Hurricane Florence becomes a threat to the coast Monday, Sept. 10, 2018, in Char

People shop at the Harris Teeter, filling up on water and supplies as Hurricane Florence becomes a threat to the coast Monday, Sept. 10, 2018, in Char

Alex Gilewicz buys supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Residents of Wilmington and Southeastern N.C. Florence ra

Alex Gilewicz buys supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Residents of Wilmington and Southeastern N.C. Florence ra

Chris Rayner helps customers load their cars as they buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurricane Florence

Chris Rayner helps customers load their cars as they buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurricane Florence

James Wemyss puts out more supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Florence rapidly strengthened into a potentially

James Wemyss puts out more supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Florence rapidly strengthened into a potentially

People buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Florence rapidly strengthened into a potentially catastrophic hur

People buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Florence rapidly strengthened into a potentially catastrophic hur

Brian Franklin prepares more generators for sale as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurricane Flo

Brian Franklin prepares more generators for sale as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurricane Flo

Jim Craig, David Burke and Chris Rayner load generators as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurric

Jim Craig, David Burke and Chris Rayner load generators as people buy supplies at The Home Depot on Monday, Sept. 10, 2018, in Wilmington, N.C. Hurric

This photo provided by NASA shows Hurricane Florence from the International Space Station on Monday, Sept. 10, 2018, as it threatens the U.S. East Coa

This photo provided by NASA shows Hurricane Florence from the International Space Station on Monday, Sept. 10, 2018, as it threatens the U.S. East Coa

In this Monday, Sept. 10, 2018, photo released by the U.S. Navy, the guided-missile destroyer USS Nitze departs Naval Station Norfolk after the announ

In this Monday, Sept. 10, 2018, photo released by the U.S. Navy, the guided-missile destroyer USS Nitze departs Naval Station Norfolk after the announ

Chris Brace, from Charleston, S.C. lowers hurricane shutters on a client's house in preparation for Hurricane Florence at Sullivan's Island, S.C., Mon

Chris Brace, from Charleston, S.C. lowers hurricane shutters on a client's house in preparation for Hurricane Florence at Sullivan's Island, S.C., Mon

Chris Brace, from Charleston, S.C. lowers hurricane shutters on a client's house in preparation for Hurricane Florence at Sullivan's Island, S.C., Mon

Chris Brace, from Charleston, S.C. lowers hurricane shutters on a client's house in preparation for Hurricane Florence at Sullivan's Island, S.C., Mon

Residents of the Isle of Palms, S.C., fill sand bags at the Isle of Palms municipal lot where the city was giving away free sand in preparation for Hu

Residents of the Isle of Palms, S.C., fill sand bags at the Isle of Palms municipal lot where the city was giving away free sand in preparation for Hu

Walker Townsend, at left, from the Isle of Palms, S.C., fills a sand bag while Dalton Trout, at right, holds the bag at the Isle of Palms municipal lo

Walker Townsend, at left, from the Isle of Palms, S.C., fills a sand bag while Dalton Trout, at right, holds the bag at the Isle of Palms municipal lo

Larry Pierson, from the Isle of Palms, S.C., purchases bottled water from the Harris Teeter grocery store on the Isle of Palms in preparation for Hurr

Larry Pierson, from the Isle of Palms, S.C., purchases bottled water from the Harris Teeter grocery store on the Isle of Palms in preparation for Hurr

RALEIGH, N.C. (AP) — The Latest on Hurricanes Florence and Isaac (all times local):

5:20 a.m.

Hurricane Florence has slightly increased in speed as it heads toward the U.S. East Coast.

The National Hurricane Center said Tuesday morning that Florence is moving toward the west-northwest near 15 mph (24 kmh) and the storm will continue a slight increase in speed during the next couple of days.

The Miami-based center says the storm's center was located about 410 miles (660 kilometers) south of Bermuda and about 975 miles (1570 kilometers) east-southeast of Cape Fear, North Carolina.

Maximum sustained winds were clocked at 140 mph (220 kph) as it moved west-northwest at 13 mph (20 kph).

Florence is expected to be an extremely dangerous major hurricane through Thursday night.

___

11:10 p.m.

Hurricane Florence continues to grow in size and magnitude as it barrels toward the U.S. East Coast.

The National Hurricane Center said Monday the monster storm will be close to Category 5 strength by Tuesday. A Category 5 storm has the potential to cause catastrophic damage.

"The bottom line is that there is high confidence that Florence will be a large and extremely dangerous hurricane, regardless of its exact intensity," the hurricane center said. Florence was a Category 4 storm late afternoon Monday.

At 11 p.m. EDT, the storm's center was located about 465 miles (750 kilometers) south-southeast of Bermuda and about 1,085 miles (1745 kilometers) east-southeast of Cape Fear, North Carolina.

Maximum sustained winds were clocked at 140 mph (220 kph) as it moved west-northwest at 13 mph (20 kph).

Some strengthening is expected during the next 36 hours, and Florence is expected to be an extremely dangerous major hurricane through Thursday.