Power outages at the Narada power station in western Australia have been caused by a transformer fault and are now expected to end by the weekend.

The outage, affecting about 15,000 people, began when a transformer at Naradara was struck by lightning.

The power was switched off for more than three hours and by Saturday afternoon more than 5,000 homes were without power.

The Bureau of Meteorology says there are no major or unusual circumstances that could have caused the outage, but the Bureau of Land Management says it is aware of the outage.

“At this stage we do not believe there is a significant risk to the safety or health of the community,” a spokesman said.

The National Energy and Resources Corporation (NERC) says there have been no impacts on power supplies.

But the Federal Government says it’s investigating the cause of the power problem.

“The Federal Government is fully committed to providing all assistance and assistance that is necessary to ensure the safety of the local communities and that all the people and property in those communities are protected,” the Department of Energy and Mines said in a statement.

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