The storm's sustained winds reached 75 mph (121 kph), just over the threshold for a hurricane, on Sunday morning as it was swirling across the Atlantic, about 750 miles (1,210 kilometers) southeast of Bermuda.
Forecasters say Tropical Storm Florence has turned into a hurricane and is swirling toward the East Coast for what could be a direct hit toward the end of the week. It was moving west toward the islands at approximately 14 miles per hour.
South Carolina Gov. Henry McMaster also declared a state of emergency on Saturday, and South Carolina's Emergency Management Division urged South Carolina residents to begin preparing their property for Florence's effects.
It is still too early to know what effects this hurricane will have on Hawai'i Island.
It's moving westward at 12 mph about 595 miles east-northeast of Hilo and 760 miles east of Honolulu. Olivia is forecast to stay a hurricane for the next couple of days while the system is experiencing light shear, balanced by very dry air aloft and marginal but warming SSTs.More news: Landslides after powerful 6.6 magnitude quake hits Japan's Hokkaido
According to the National Weather Service, the storm will take a turn toward the west-southwest overnight on Monday, with the state beginning to feel the impact of the storm from Tuesday afternoon through the evening.
The storm was expected to bring rain and high surf rising to rise up to 18 feet on east-facing shores of Hawaii Island and Maui. "Some gradual weakening is possible on Tuesday, but Olivia will likely remain a threat to the Hawaiian Islands next week", the hurricane center said.
Two hurricanes are churning in the Pacific Ocean near Hawaii, the National Weather Service said Friday. Hurricane-force winds extend outward up to 30 miles from the center and tropical-storm-force winds extend outward up to 120 miles.
The NHC said Olivia will weaken further over the weekend, and possibly downgrade to a tropical storm by Tuesday.