People attended church services across Australia Sunday to remember the victims of brushfires that swept through Victoria state a week ago.

Fast-moving fires killed more than 180 people and destroyed 1,800 homes in the deadliest disaster of its kind in the country's history.

At one service to mourn the victims and honour firefighters, Australian Prime Minister Kevin Rudd promised to rebuild devastated towns to help the more than 7,000 people now without homes.

"We'll rebuild, and we'll rebuild together, and not just for tomorrow, and not just for next week, and not just for next month, but until this community is rebuilt completely," Rudd said during an open-air service in Wandong, where fires killed three people and destroyed about 200 homes.

On the steps of the Sydney Opera House, people listened to a performance of Dawn Chorus by 100 singers from Sydney Philharmonia Choirs and counter tenor Tobias Cole during a special fundraising event for the victims of the Victoria wildfires.

Canadian singer-songwriter Leonard Cohen has donated $200,000 US to aid victims. Cohen is touring Australia and hopes his contribution will go directly to families in need.

Meanwhile, Melbourne-born Kylie Minogue and her sister, Dannii, are said to be planning a benefit concert in London with fellow Australian singer Natalie Imbruglia at a time not yet specified.

While the worst of the damage was reported last weekend, 12 fires continued to burn across Victoria on Sunday.

Fire engines raced past the small, 140-year-old Christ Church in Whittlesea while the archbishop of Melbourne was leading a service, their sirens briefly drowning out a song.

It's believed some of the 400 blazes were deliberately set.

One suspect is due to appear in court in Melbourne on Monday to face charges of arson causing death, intentionally lighting a wildfire and possessing child pornography.

His identity is being concealed by the court because of the risk of reprisal attacks against him or his family.

With files from the Associated Press