LANIAKEA, OAHU (HawaiiNewsNow) - Authorities are advising residents along north and west facing shores to prepare for possible flooding and damage as a high surf warning was issued for Sunday night.
The National Weather Service says tonight's high surf warning should not be taken lightly. With expected wave heights of 45 to 55 feet, there's a strong chance that coastal roads and homes will see some damage.
Residents like John O'Scanlon are making sure they're prepared for the worst.
O'Scanlon's beach front home in Mokuleia was was damaged last week during a huge swell when waves flooded his home.
This time, O'scanlon made sure he's ready well ahead of time with enough sandbags for himself and his neighbors.
The NWS says it's not unusual to see huge swell events during the winter, however tonight's warning is rather dangerous.
"The largest magnitude we've certainly seen this season with enough energy to cause a significant hazard to people not only in the water but also on the shores also in cars," said Jeff Powell of the NWS.
Ocean Safety lifeguards say flooding is likely to occur along the highway north of pupukea, just as it did a few weeks ago. They are calling in extra help from the state Department of Emergency Management.
"Our main concern is going to be public safety and with that a lot of places will have high surges due to the big surf," said Vitor Marcel, an Ocean Safety Lifeguard.
Other vulnerable areas of high concern include roads and homes around Sunset Beach, Laniakea and Dillingham airfield. NWS says anyone, even professional surfers, in those locations should take the proper precautionary measures.
"If you're in the wrong place it could be about survivability and not just surfability," Powell said.
Officials say surf is expected to increase rapidly Sunday night and remain dangerously high through Monday night.