Fire crews are attending to two electricity transformer fires in Castlecliff and power has been cut to part of the suburb.
A Fire and Emergency spokesperson said a transformer was reported on fire near Egmont St at 7.20pm on Sunday.
"It caused the power line to arc," he said.
"Power authorities are there isolating power to the area."
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One fire crew is on the scene and there is a strong burning smell in the air.
At 8pm another transformer exploded in the area, the spokesperson said.
Powerco is reporting 98 properties have been affected.