Waves with up to 70-foot faces rolled into Oahu’s North Shore on Monday, forcing an hours-long closure of Kamehameha Highway and damaging homes, according to Hawaii News Now. On Tuesday, National Weather Service officials said the swell was one of the strongest surf events in Hawaii in the last 50 years. And, they warned, another swell is on its heels.

At least one home sustained serious damage from the waves, officials said, and they feared other homes were at risk. Officials also said surf had undermined the foundation of a lifeguard stand at Laniakea. Waves toppled a Haleiwa home’s seawall, undermined the home’s foundation and washed away a tree. Waves were also showering cars, creating hazardous driving conditions and pushing rocks onto the roadway. READ MORE