It is moving to the west at about 14 miles per hour.
A satellite image, supplied by the US National Weather Service, shows Hurricane Hector, a category four, as it moves towards the south of Hawaii.
Hurricane Hector regained strength in the eastern Pacific late on Sunday and swelled into a Category 4 storm again with sustained 140 miles per hour winds as it stayed on target to possibly hit Hawaii by midweek, officials said.
"While the official forecast track continues to lie south of the Hawaiian Islands, it is too soon to determine what kind of impacts might occur in the state, since track errors can be large at long time ranges", the NHC said.
The U.S. National Hurricane Center in Miami said the hurricane poses no short-term threat to land.
Hurricane-force winds extend outward up to 30 miles (45 km) from the center and tropical-storm-force winds extend outward up to 105 miles (165 km).
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A powerful hurricane is on course to collide with an erupting volcano on Hawaii's Big Island within days, forecasters have said.
At 11 p.m. HST on Saturday, Aug. 4, 2018, the center of Hurricane Hector was located 1325 miles ESE of Hilo and 1440 miles ESE of Kahului, Maui, near latitude 14.4 North, longitude 135.7 West.
Hurricane Hector is on track to hit the Big Island of Hawaii according to CNN. "However, Hector is expected to still be a major hurricane when it moves into the central Pacific basin", according to the NHC.
The Kilauea volcano has spewed lava and molten rock into neighborhoods in Hawaii's Big Island for three months.
Hurricane Hector became a Category 4 storm for a few hours early Sunday but then dipped back to Category 3, still a unsafe force, as it headed across the Pacific, threatening to hit Hawaii's Big Island and possibly its active volcano, officials said early Sunday. At least 700 homes have been destroyed, authorities estimate, and thousands of people have been displaced.