Evacuation warnings have been issued for several small communities in northern Victoria where rivers are expected to peak earlier than previously thought.
The Wimmera River at the western town of Jeparit is tipped to peak on Saturday and the SES fears up to 20 homes could be inundated.
Further north, several towns around Lake Charm, near the New South Wales border, have been warned to evacuate as floodwaters are expected to peak earlier than predicted.
The ABC reports an evacuation warning is in place for areas around Lake Charm, Mystic Park, Bael Bael and Fairley.
A relief centre has been set up at Lake Boga for people who need emergency accommodation.
About 100 army reserve personnel have been called in to help. The floods have so far swept through more than 70 towns across the state.
The communities of Murrabit and Benjaroop are also preparing for major flooding. The floods are expected to threaten communities in the north and north-west of the Victoria for up to 10 more days.
Another 10 districts in New South Wales have been declared natural disaster areas, raising the total number there to 77.
State Emergency Services Minister Steve Whan says receding floodwaters have revealed the true extent of the damage.
He says there is extensive damage to roads, bridges and other infrastructure in the area surrounding Broken Hill in the west of the state.