Tensions have been raised over flights from Melbourne still landing in the city and this weekend's Orange Fire Festival.

Orange City Council CEO David Waddell said it was "unfortunate" to have a positive case and urged people to "be alert, not alarmed'.

"There's a feeling we're going back to square one where we were in March, however on the plus side health say they've got onto this quickly, this time we've got a big testing facility and we go into this with a feeling of confidence," he said.

Mr Waddell said the city didn't have the power to close the airport or limit people coming into Orange.

"Fire festival is on, a lot of people are coming up, it's very positive for tourism but we've got a number of visitors coming in from Sydney," he said.

"All we can hope is every venue, every facility this weekend is sticking to the rules. I've spoken to police and they're going to be very active this weekend."

Member for Orange Phil Donato said it wasn't surprising to see the virus re-emerge in Orange and called for people to stay "measured and calm".

"We've done very well in the past few months so I don't think we should be looking to lock back down or shut Sydney off," Mr Donato said.

"We can't shut down every time there's a case out here.

"The last few weekends Orange has been booked out and businesses have done very well to meet all the requirements."

Member for Calare Andrew Gee said the new case was a "timely reminder" Orange isn't out of the woods and "it doesn't take much to undo months of hard work".

"The whole community needs to remain vigilant, so if you have even the slightest symptom, please make sure you go and get tested," he said.

He also urged NSW health authorities to inform the public "as quickly as humanly possible".

"In order to round up COVID-19 locally, we're also going to need details of new infections as soon as they arise," Mr Gee said.

"Until a vaccine arrives, public information combined with testing are vital to successfully keeping a lid on this virus."

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