Lava from the Kilauea volcano has cut off all access to the community of Kapoho, and officials estimate that this has left about 12 people completely trapped.
Officials had issued mandatory evacuation orders for Kapoho as well as nearby Vacationland and Leilani Estates, urging those in the area to get out by Friday or risk being unreachable by rescue crews.
"There are still people in the inundation zone that cannot, there's no way for them to get out. They're down there, we're seeing them, they're not calling for help yet," said Senator Kai Kahele, who is also a major in the Hawaii Air National Guard.
Those who chose to stay may have to pay the bill for their rescue, KITV reported.
Kahele said the devastation in the area was unprecedented.
"This is something most of us will never see in our lifetime," he said.
About two dozen recent fissures have appeared since the volcano began erupting on May 3, destroying dozens of homes.
The Associated Press contributed to this report.