NSW has reported 38 new locally acquired cases of Covid-19 on Thursday as the state continues to grapple with a widespread outbreak in Sydney.
It is the highest number of daily cases since the outbreak began on June 16 and poses serious questions over contact tracers' ability to get on top of the spread of infection.
Twenty of the latest cases were partly or fully in the community whilst infectious.
"Those numbers are too high," Premier Gladys Berejiklian warned.
She said there needs to be a change in behaviour to ensure cases don't flare further.
"Please stop visiting people indoors, outside your family, your household. Your immediate family means those you live with," Ms Berejiklian said.
"It doesn't mean extended family or friends. That goes across the board across any person who is in lockdown."
Chief Health Officer Dr Kerry Chant reiterated the premier's stance, stressing it is "critical we minimise our movements" as the virus was detected across several households.
She clarified family meant those in your household, and visits to relatives in other premises were not permitted.
Concerned about compliance to the lockdown, Dr Chant delivered yet another message to young residents.
"You have a great role to play," she said.
"It is critical that everyone sees themselves at risk."
The source of twelve of the latest cases are under investigation.
The latest spike comes after Sydney's hopes of lockdown lifting on Friday were dashed when it was extended until July 16.
Virus spreads to new areas again
Focus turned to the three local government areas of Fairfield, Canterbury-Bankstown and Liverpool on Wednesday after health authorities detected several cases in the area.
Yet in what is a constantly-developing situation, Dr Chant warned the virus was now spreading again into new areas.
"What we are now seeing is cases pop up in other geographical areas overnight," she said.
She called on those in areas without virus detected in the community not to assume they face no danger.
"Please do not think that it is only the suburbs I am telling you about... everyone has a part to play.
"We are seeing cases pop up everywhere."
She called on people to only go shopping if it was necessary.
There were 39,733 tests reported to 8pm Wednesday, compared with the previous total of 45,000.
There have been 395 locally acquired cases since the outbreak began.
Dr Chant said the next 24-48 hours would prove vital to see if health authorities had managed to halt chains of transmission.
Berejiklian still envisages July 16 lockdown exit
Despite yet another daily record amid the outbreak, Ms Berejiklian said it was still her government's vision to exit lockdown on July 16.
"Experts have told us it is achievable," she said.
But the premier said it was dependent on people doing the right thing.
"We just need people to stop interacting for this lockdown to work... people are moving around because they feel like it."
NSW Health also confirmed that a fifth aged care worker at SummitCare Baulkham Hills had come down with the virus, but was already isolating. Six residents to date have caught COVID-19.
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