A broader lockdown looms for Sydney, with another 12 COVID-19 cases recorded in NSW and exposure venues spreading past hotspot areas.
Premier Gladys Berejiklian says a crisis cabinet meeting will be held on Saturday, and she has foreshadowed an expansion of the seven-day lockdown, which began overnight.
Infections are growing at a similar rate to Friday, she says, but exposure sites have begun emerging in areas outside of those locked-down.
They include communities within the northern beaches and western Sydney, where people have potentially been infectious for days.
Some 29 cases were recorded in the 24 hours to 8pm on Friday, 17 of which had already been announced, taking the cluster to 80 cases.
More than half were not in isolation from the beginning of their infection period.
"What we're finding is by the time we've got to some of those cases, they've already on-transmitted," Chief Health Officer Kerry Chant said.
"That means there have been a number of people that have been infectious in the community unknowingly for a period of time."
A new potential 'super spreader' venue has also been identified, with two cases linked to Great Ocean Foods at Marrickville.
Anyone who worked in, attended or was a customer at the seafood supplier's Marrickville store from June 21 to June 25 is a close contact and must immediately get tested and isolate for 14 days, regardless of the result.
To "get ahead of the rings" of transmission, NSW Health has also taken the unusual step of declaring their household members close contacts too.
"Previously one or two people in the household may have had it. Now we're seeing everybody get it," the premier said.
Anyone who directly received a delivery from Great Ocean Foods over the same period - and their household contacts - must immediately get tested and isolate until contacted by NSW Health.
Other venues of concern include Sydney's Cheers Bar & Grill on June 20 between 1.45am and 3.30am, and Rebel at Bankstown shopping centre on June 24 between 3.45pm and 4.30pm.
Anyone who attended the venues at those times is a close contact and must get tested and isolate for 14 days.
Dr Chant appealed for Sydneysiders to use common sense and check the list of exposure sites every time they leave the house.
"Yes there are the orders but ... can I just urge everyone to err on the side of caution," she said.
"If you're in doubt about whether you are in a public health order or you have restricted movements ... just assume you are impacted."
Health Minister Brad Hazzard also pleaded for patience and co-operation as authorities determine how best to reign in the outbreak.
"The Delta variant is proving to be a very formidable foe," he said.
"No matter what defensive steps we're taking at the moment, the virus seems to understand how to counter attack."
Millions of people in Sydney are already in lockdown, with those living or working in the Woollahra, Waverley, Randwick and City of Sydney council areas unable to leave home for a week except for essential purposes.
The order took effect from 11.59pm on Friday and lasts until 11.59pm on Friday, July 2.
On Saturday that was expanded to include people who study in those areas.
The Australian Medical Association has been agitating for a broader lockdown of the entire Sydney basin, saying on Friday the current restrictions will not be enough to get on top of the outbreak.
Restrictions remain for other areas of Greater Sydney as well as the Central Coast, Blue Mountains, Wollongong and Shellharbour, while those who live or work in the Inner West, Canada Bay or Bayside council areas are still barred from leaving metropolitan Sydney.
© AAP 2021