Engineers and workers on Monday morning checked the site where a 4-foot boulder crashed into a townhouse in Hawaii Kai during heavy rains.
The boulder hit a parking pillar at the bottom level of the complex. It happened just before 7:30 p.m. Sunday at 400 Kawaihae St.
No one was home at the time of the crash, police said.
Crews warned residents that there is a potential for more boulders to come crashing down.
The land above the townhouse belongs to Kamehameha Schools. The organization sent an inspector to the scene, neighbors said.
"We are thankful no one was hurt in this incident. Our initial site inspection could not pinpoint the origin of the boulder; however, we have been in touch with the homeowner association's property manager who is working with their insurance carrier to address the immediate situation. We will know better what our next steps will be as more information about this incident becomes available," Kamehameha Schools spokesman Kekoa Paulsen said.
The homeowners did not stay in the unit overnight but returned Monday to inspect the damage.
"We have talked to Kamehameha schools and the property manager and the building manager. We are trying to figure out where the boulder came from and where the property lines are and the contractor is coming out to make sure the building is stable," Darin Shigeta.
Neighbors say recently, smaller rocks have come down the hillside. Long time residents say about 25 years ago another large boulder rolled down and hit a pillar not far from the unit that was damaged Sunday night.