Premier Gladys Berejiklian said the death was in an older person.

"Over 50 of the 77 cases are close family members of those who've been infected," she said.

"The people whose lives and health that we're risking the most are those closest to us."

Ms Berejiklian said she was anticipating new cases of 100 or more tomorrow.

"I fear tomorrow and a few days afterwards will be worse," she said.

"The tide will turn once the changes we've made come to fruition.

"Last night, we saw 33 people who were diagnosed who had some level of exposure in the community ... that is the number we need to see go down.

"We're doing well in regional NSW and we want it to stay that way."

Chief Health Officer Kerry Chant said it was a woman in her 90s who died.

"Again, it highlights the severity and the impact that COVID can have," she said.

"I understand she was un-vaccinated, but we'll confirm that.

"We know transmission is going from household to household.

"The numbers might actually increase because we're ramping up testing.

"Twenty-three of the people admitted to hospital are under age of 55 ... six are under the age of 25.

"Of the 15 people in ICU, one is in their teens, one is in their 20s."

Dr Chant said contact tracing had been expanded with public health units across the state supporting the effort.

"We're distributing the case interviews across the state ... and making sure that information is coming back," she said.

Of 106 infringement notices given by NSW police, six were given to people around Orange.

Deputy Commissioner Gary Worboys said police were "getting tired" of people bending the public health orders.

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Ms Berejiklian is urging essential workers like tradespeople to get tested to ensure they aren't spreading the virus to multiple sites.

"We've seen a number of cases in people doing essential work at multiple sites," she said.

"You are particularly vulnerable in getting the disease and spreading the disease."