Floodwaters at Shepparton in northern Victoria are holding steady at a peak of 11.1 metres and are not expected to rise much further.
About 400 homes at Kialla Lakes, just south of Shepparton, are isolated after floodwaters forced roads to the estate to be closed overnight.
The ABC reports they have been told they could be cut off for several days.
Stormwater drains at Mooroopna have started to back up and the Army spent the night sandbagging businesses.
But the SES says damage to homes in the Shepparton area is expected to be minimal.
Floodwaters at Horsham in the north-west of the state, are expected to peak around mid-morning. About 20 houses are at risk.
The situation has eased in Wangaratta, but the ABC reports councils are still monitoring the Wilson Road levee, which is a potential risk to 60 homes.