The storm is expected to pass the southernmost point of the Big Island on Wednesday morning.
The hurricane, which was upgraded to a Category 4 storm late Sunday night by the National Hurricane Center (NHC), is carrying sustained winds of up to 140 miles per hour, with hurricane force winds extending 30 miles from its center.
Swells generated by Hector are expected to reach the southeast and east shores of the Big Island and eastern Maui later Wednesday, and produce large and risky surfs.
Hurricane Hector will continue to churn out in the Pacific and could reach Hawaii as early as Wednesday although, by that time, it should start to weaken. It was centered about 1,525 miles (2,455 kilometers) east of Hilo, Hawaii and was moving toward the west at 12 mph (19 kph).
CNN meteorologist Haley Brink said while Hector is heading in Big Island 's general direction, it's too early to tell if it's on a collision course with the volcano. "It is still too soon to tell what effects this hurricane will have (if any) on the Hawaii islands".