Honolulu city officials say a large portion of the Kailua Boat Ramp has collapsed.
Strong waves damaged and sank the dock. The waves are also causing major beach erosion on Kailua's shorelines.
"When we moved here 10 years ago, there's a nice beach to hang out on and now there's no beach at all," said Kailua resident Mark Ferry.
The prolonged high surf on east-facing shores has sped up the erosion.
Many Kailua residents say the beach used to start in the middle of the boat ramp. Now, the beach starts at the bottom of a cliff.
"We know up to this lifeguard shack that's recently where the erosion is, but it extends further down the beach," said Al Tufono acting Parks and Recreation Director.
Tufono says it's so severe right now, ironwood trees with exposed roots are falling into the water. Crews spent Friday cutting trees along the shoreline.
Strong currents also caused a large sinkhole in the Kailua Boat Ramp. The ramp is closed as dock debris continues to fall into the ocean, turning it brown.
"We are planning on fixing the boat ramp in the next two weeks," Tufono said.
As for the beach itself, Tufono said the city can't do any remediation work right now because of the high surf.
Due to the high surf advisory, Waimanalo Beach and many windward-facing beaches saw some erosion, but none as severe as Kailua Beach.
They city says they are working on an islandwide plan to prevent future erosion on Oahu's beaches.