Hector was downgraded to a Category 3 storm and it's expected to continue losing steam over the next couple of days, the National Hurricane Center said.
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.
Hurricane-force winds extend outward up to 30 miles from the storm's center and tropical-storm-force winds extend outward up to 100 miles.
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 unsafe surfs.
Lava spewed from Kilauea since May 3 has covered 13.4 square miles (34.7 sq km) of the island's surface, destroying more than 700 homes and displacing thousands of residents. The Big Island has been coping with three months of Kilauea's volcanic eruptions that have sent lava flowing into some neighborhoods.
Hurricane Hector picked up strength as it entered the Central Pacific Basin, according to forecasters. She says there could also be a few inches of rain into Thursday as Hector passes the island.
Hawaii emergency officials are keeping track of a hurricane that's expected to pass to the south of the islands this week.
Hector is a category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. After that, gradual weakening is expected Monday night through Wednesday.
Hurricane Hector's current trajectory puts the hurricane on a virtual collision course with Kilauea on the southern part of the island.
A tropical storm watch is in effect Monday for waters south of the Big Island.