Emergency management Victoria urged residents along Winchelsea, Lorne, Beeac and surrounds to seek shelter indoors.

"Intense rainfall is likely," the warning read.

The State Emergency Service responded to 116 requests for help in the area, while more than 1170 properties were still without power on Wednesday morning.

A further 734 properties elsewhere in the state were facing outages on Wednesday after the damaging storm.

Meanwhile, residents in parts of NSW and southeast Queensland are also recovering after heavy storms hit on Tuesday night.

The Bureau of Meteorology issued severe thunderstorm warnings for Ipswich, southwest of Brisbane, and Campbelltown, southwest of Sydney.

In the 12 hours to 5am on Wednesday, the NSW State Emergency Service said it responded to 160 incidents across the state, including five flood rescues.

Blacktown and Penrith in Sydney's western suburbs were the busiest areas, with 70 incidents reported.

More rain is forecast for parts of NSW and Queensland on Wednesday.

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Footage of the severe weather shows cars in the area trapped by the flooding, with Corio, nine kilometres north of central Geelong, hit particularly hard.

The situation is being closely monitored by the Bureau of Meteorology, saying further warnings will be "issued as necessary."

with Australian Associated Press