Thousands of people in Queensland were left without power for several hours on Tuesday afternoon.
Energex, an electric power distribution company owned by the Queensland Government, confirmed a "widespread" outage.
The outage spanned from the Gold Coast to Caboolture and affected some 375,000 Energex customers.
"When we know more, we'll update this page," the Energex tweet said.
"Pls [please] assist by only contacting us for life-threatening issues as our teams have no additional details to provide."
By 3.15pm on Tuesday, Energex said 250,000 people in Queensland who had been impacted by the outage had their power restored.
"We’re advised the outage is due to a loss of generation at a power station. We're working with agencies & station operators to restore supply to our network as soon as power is available," Energex said.
The Australian Associated Press reported there have been reports of outages in regions further north such as Maryborough, around Toowoomba, and Innisfail.
Fire breaks out at power station
Queensland energy company CS Energy said a fire broke out at Callide Power Station near Biloela in Central Queensland at about 1.45pm.
"At approximately 1.45pm today, a fire occurred in one of the turbine halls at the power station," the tweet said.
"As a result, the three units that were generating at the time went offline. We immediately evacuated the power station and called emergency services to attend site. At this stage, there are no reported injuries."
Queensland Fire and Rescue confirmed the turbine fire and said multiple FRS crews were at the scene.
"An evacuation of the power station has been completed and a 550m exclusion zone has been setup while firefighting operations take place," QFES said.
"Power to the station has been isolated. This incident is expected to be a prolonged event. Residents and community members are asked to avoid the area."
The Energy Market Operator called the outage a significant power system event, involving multiple transmission lines out of the power station.
There are reports that power is being restored in some parts of southeast Queensland, but many thousands remain without power.
Traffic authorities in metropolitan Brisbane have tweeted a warning to drivers.
"Traffic signals are not operating at numerous intersections throughout Brisbane and SE Queensland, Energex are working to restore power," the tweet said.
Gold Coast trams were also hit, with services suspended from Broadbeach South to Cavill Avenue in Surfers Paradise.
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