Victorian State Emergency Service chief operations officer Tim Wiebusch says a sandbag levee is expected to help keep the majority of Kerang dry, but with the Loddon River expected to peak Wednesday or Thursday the town will be cut off.

The state government has announced a $351 million flood recovery package to start the clean-up effort.

More rain is forecast in the coming days and the floods are expected to impact the state's north for four-to-six weeks.

The Goulburn River at Shepparton peaked overnight at 12.05 metres, below the forecast peak of 12.1m and the 1974 flood level of 12.09m.

Images show buildings in the middle of town surrounded by a vast inland sea of brown muddy water and residents using sandbags to protect properties.

There are about 60 warnings across Victoria at the moment, while nearly 360 roads are closed around the state.

More than 180 Australian Defence Force personnel are helping with flood effort across the state, including 11 aircraft. Additional aviation support will arrive from Tuesday.

More than 11,060 applications for flood relief payments have been lodged, while the SES has received more than 620 requests for assistance in the 24 hours to 10.45am Monday.

- with Australian Associated Press