Another 19 Victorians have died in the past 24 hours and NSW on 'knife's edge' as NSW records 22 new cases overnight.

Victoria has recorded 331 new coronavirus cases and 19 deaths in the past 24 hours and its equal deadliest day after 19 lives were lost in the 24 hours leading up to Monday. The state has recorded 38 fatalities in the past 48 hours and the 19 new deaths brings Victoria’s death toll to 247.

This comes as a record number of people were fined for breaching the lockdown on Monday. Victorian police issued a record 276 fines to people breaching coronavirus restrictions, including 74 who breached curfew.

Victorian authorities have warned that there will be many more deaths ahead for the state.

Deputy chief medical officer Professor Michael Kidd noted the drop in coronavirus cases in Victoria was “promising”, but said deaths usually follow around seven to 10 days after someone is first diagnosed.

“While it‘s heartening to see the declining number of cases being reported each day from Victoria – and we have seen that over the past five days – while we still have hundreds of cases being reported each day, we will continue to have people admitted to hospital and people becoming gravely unwell. And sadly some of those people will die.

Meanwhile, NSW Premier Gladys Berejiklian says there have been 22 new coronavirus infections in her state, including several fresh cases linked to a school in Sydney's north west, marking the biggest state's spike in cases since April.

Four of those are from people in hotel quarantine, two are from Victoria and eight are linked to the Tangara school cluster in Cherrybrook. There are now 17 cases associated with the Tangara School for Girls, just days after the cluster was first discovered.

Ms Berejiklian urged people to be cautious about their daily activities and not take any unnecessary risks.

"This is not the time for complacency. It is the time to be on high alert," she said.

My anxiety has not subsided in relation to what a knife's edge NSW is on but we need to keep pulling together, doing the right thing, and keep maintaining our social distance and most importantly, even with the mildest symptoms stay home and get tested."

Ms Berejiklian said she expected a cluster in Sydney's north-west to grow even further and has urged schools to stop extracurricular activities to curb the spread of the virus.