RFS crews from Darkes Forest and Bulli had an early call out this morning after rushing to power pole fire at Maddens Plains around 2am.
Fallen lines forced the closure of the southbound lane on the Princes Highway for some time.
RFS Illawarra said firefighters kept their distance and monitored the situation until Energy crews arrived.
RFS Illawarra said the image above shows the moment the lines arc and react to the moist air, creating a potentially dangerous situation for crews.
Image: RFS Illawarra