Rough seas off normally placid Lanikai Beach kept lifeguards busy Tuesday afternoon as strong winds damaged roofs and downed trees throughout the day.

The winds had firefighters responding to downed power lines and trees Tuesday evening.

The National Weather Service said a fast-moving cold front passed over the island chain Tuesday, and is now south of Hawaii island. Cool and gusty winds followed behind the front and over the state.

Gentler breezy and cloudy weather is expected today on Oahu, supplying cool, if not dry conditions, weather officials say. Today’s high is expected to be in the mid-70s with winds of 20 to 25 mph with Windward and mauka showers likely, forecastsers say.

At Lanikai Beach, a lifeguard on a rescue watercraft helped 13 people get to shore safely in “blustery and rainy” conditions between the beach and the Mokulua islands, Shayne Enright, a spokeswoman for the Ocean Safety Division said.

About 2:30 p.m., a kayaker called 911 call because he couldn’t get to shore, Enright said. The lifeguard brought the man and two other kayakers to shore.

Then the lifeguard went back out to rescue three women stand-up paddlers. Two of the women were in the water and unable to get back on their boards, Enright said.

As weather conditions worsened, lifeguards brought in seven more kayakers from the Mokulua Islands as a precaution.

Elsewhere on the east shore, lifeguards rescued 11 people in the Sandy Beach and Makapuu areas and issued 465 warnings.

Lifeguards were also busy on the south shore, where there was a small south swell of 3 to 6 feet. Lifeguards in Waikiki beach towers rescued five people, while other lifeguards using rescue watercraft rescued 8 people.

Lifeguards also warned 641 people about the surf and wind conditions on the south shore.

City officials said firefighters were kept busy Tuesday because high winds Tuesday night toppled trees at Anonui and Anoiki Streets in Kunia, Lakeview Circle in Wahiawa/Schofield area, Waialae Iki Neighborhood Park on Kalanianaole Highway, 85-716 Farrington Hwy., Mililani District Park, Waianae Elementary School, Koko Head Shooting Complex. and Hawaii Kai.

One person was injured when winds took off the roof of the State Sheriffs’ structure at the Koko Head Shooting Complex and flipped it over, landing on the hillside. City parks crew will remove materials today.

About 6:30 p.m. Tuesday, firefighters responded to a fallen tree in Waipahu and found a tree two feet in diameter and 30 to 40 feet long blocking the road near Anonui and Anoiki streets, Jenkins said.

Other downed trees were reported near Waianae Elementary School, which knocked down a power line, and Waianae Baptist Church. Firefighters also responded to Hawaii Kai, Ewa Beach, and Kaneohe for wind-related incidents.

Downed trees were reported at Anonui and Anoiki streets in Kunia and Waialae Iki Neighborhood Park on Kalanianaole Highway. Also, the city reported that a tree more than 30 feet tall was cracked and hanging over the street on Lakeview Circle in the Wahiawa area.

The Weather Service posted a wind advisory that is in effect until 6 p.m. for Hawaii island and Lanai. Winds of 25 to 35 mph with gusts up to 50 mph are expected, weather officials said.

A high wind warning is in effect for the peaks of Mauna Loa and Mauna Kea until 6 p.m. today. The advisory warned of 50 to 60 mph winds with gusts to 75 mph above the 8,000-foot level on the mountains.

A gale warning is now in effect for the waters between Maui and Hawaii island and scheduled to go into effect for the east side of the Big Island at 6 p.m. today. Both are scheduled through 6 p.m. Thursday, the Weather Service said.

The warning forecast 25- to 35-knot winds with higher gusts and seas of 7 to 12 feet beginning this morning.

A high surf advisory was also in effect for north and west shores of Oahu, Maui and Molokai. Surf was forecast to be 12 to 18 feet on the North Shore and 8 to 12 feet off the Waianae Coast.