SA Power Networks has sent a helicopter crew to the mid-north of South Australia to try to find a fault which has caused blackouts.
About 1,000 properties are without power at Pekina, Tarcowie and Jamestown, after storms swept through the region overnight.
Some properties near Leigh Creek in the far north also are without power.
Rain has been hampering efforts to restore the connection.
© ABC 2013
08:52 EST A second storm cell developing off New South Wales is expected to hit northern parts of Sydney and the Central Coast this morning.