Strong winds wreaked havoc on Oahu Saturday, with fallen tree branches blocking roadways, power outages and a brush fire after gusts knocked down a power line in East Honolulu.

Crews from the Honolulu Fire Department and Hawaiian Electric Co. responded to a flood of calls reporting incidents ranging from hanging power lines to roof damage.

Most of the Hawaiian islands experienced 20- to 40-mph winds with gusts of 50 to 60 mph, according to Matthew Foster, a meteorologist with the National Weather Service.

In the afternoon, wind conditions peaked at Lanai Airport with 62 mph gusts and at Marine Corps Base Hawaii in Kaneohe with 69 mph gusts.

Foster said strong winds were to continue Saturday night before tapering off today.

The high wind and offshore gale warnings were set to expire at 6 a.m.

“We should see a pretty good drop-off,” he said. “But they could stay pretty strong for Maui County and the Big Island.”

By 9 p.m. Saturday, Honolulu firefighters had responded to 72 weather- related calls on Oahu, according to Honolulu Fire Capt. Michael Jones.

A wildland fire broke out on Waialae Iki Ridge near the top of Okoa Street at about 8:30 a.m. after high winds knocked down a power line. Area homeowners and hikers reported seeing smoke in the valley near Wiliwilinui Ridge trail.

Firefighters endured high winds and steep terrain to reach the fire. The blaze scorched about 1 to 1-1/2 acres of brush on a steep cliff face before firefighters contained it shortly before 2:30 p.m.

Jones said no structures were damaged and no injuries were reported.

As of 9 p.m., Honolulu firefighters had responded to 48 reports of blown roofs. Punchbowl, Waianae and Manoa were among the areas affected. Jones said they continued to receive reports of blown roofs after 9 p.m.

Crews also responded to at least 20 reports of downed trees in areas that included Mokuleia, Nuuanu, Kaimuki and Hawaii Kai.

Power outages occurred across the island, with Kaneohe suffering the brunt after about 3,000 customers lost power at about 5:40 p.m. As of 6:45 p.m. Saturday, crews were still working to restore power to residents.

Barbara Heckathorn, a spokeswoman for Hawaiian Electric Co., also reported that approximately 900 customers in Kaimuki had no power from 11:30 a.m. to 3 p.m.

A downed power line in Kuliouou caused an outage for about 600 customers. The outage was reported at 11:45 a.m., and power was restored at 2:45 p.m. after crews replaced the line.

Windy conditions also caused a short outage in Manoa, affecting 500 customers in the early morning hours.

Heckathorn said crews worked tirelessly in wind and rain to restore power as quickly as possible.

“Whenever we know the weather is bad, we always have a lot of crews on standby.”

On Kauai, crews of the Kaua‘i Island Utility Cooperative responded to minor power outages in Wailua Homesteads, Koloa, Poipu and Lawai due to downed trees affecting power lines. Power was restored to affected areas within two to three hours, said spokeswoman Beth Tokioka.

Hawaii island and Maui had no reports of weather-related incidents.

Meanwhile, a high-surf advisory is in effect for the east shores of all Hawaiian islands until 6 p.m. today. The National Weather Service reported surf conditions of 8 to 12 feet. Forecasters advised beachgoers to exercise caution as strong breaking waves and currents are expected.