Sand and seawater washed up on Farrington Highway along the Wai'anae Coast and on Kamehameha Highway on the North Shore and as far down as Kane'ohe, Cummings said.

"Our state Department of Transportation road crews were right on top of things and were busy removing sand and debris, especially from about midnight through 3 or 4 a.m.," Cummings said.

Among the areas hardest high by the high waves were sections of Kamehameha Highway near Rocky Point and Ke Nui Road near Sunset Beach on the North Shore.

"At one point, there was about 6 inches of sand on the highway," Cummings said. "It never reached the point where it became impassable and once again, the state roads crew was able to keep up with it," Cummings said.

There were also reports of water, sand and other debris washing over Farrington Highway in Nanakuli and Ma'ili Beach Park at about 3 a.m., Cummings said. Most of the reports of water and sand on the highway coincided with high tide in the affected areas, he said.

About 20 O'ahu Civil Defense volunteers monitored the situation overnight and will likely be out again tonight, Cummings said. He did not immediately have any reports on how high the surf got at various spots on O'ahu overnight.

"At one point, about 3 a.m. this morning, there was some concern about our homeless people at Ulehawa Beach Park in Nanakuli and possibly the need to open a shelter for them," Cummings said. But as the high-surf problems began to dissipate, the decision was made not to open a shelter, Cummings said.

Bryan Cheplic, spokesman for the city Emergency Services Department, said yesterday's huge surf did not result in any rescues or other emergency actions.

"That's probably because the winds were so high yesterday nobody was really going out" in the surf, Cheplic said.