Festival attendees have told Hack they were evacuated from a dance music event north-east of Melbourne on Monday despite no recorded incidents in the area, only to be drug tested by police as they left.

The Country Fire Association as well as the State Control Centre - which coordinates Victoria's fire response - have told Hack they did not know of any specific incidents that would have caused an evacuation near the Wild Horses festival in Marysville.

But several attendees have said there was an announcement at 9:30am urging everyone to leave immediately on Monday - the morning after the music had finished and many would have been leaving the event.

On Monday, temperatures reached around 36 degrees in Marysville and the state was on alert for fire because of the hot, dry conditions.

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"The announcement said that weather conditions were deteriorating... there'd be possible bushfires in the area, so we'd have to do an immediate emergency evacuation," one punter, Kaitlin Rapke told Hack.

"A lot of people started stressing."

Many punters have said they then drove out of the gates into a drug and alcohol testing operation, causing traffic out of the area.

"Everyone started to get worried... when we'd left, the police had set up a booze bus bottlenecking traffic into one lane," another attendee, Tasman Brown said.

If there's an evacuation, you'd want to get everyone out of there ASAP but it seemed like they wanted to booze bust everyone.

Police have said drugs were found in one in four cars searched over the course of the festival, including cannabis, cocaine, ecstasy, and speed.

Officers said 60 attendees were found in possession of drugs while two people were hospitalised after suspected drug overdoses.

"If you choose to attend a festival in possession of illicit drugs, you will be detected," Senior Sergeant Mark Hesse said in a statement.

"No matter how well you think they are concealed, you will be caught."

In a statement to Hack, a police spokeswoman said officers did not order any evacuation.

"At one stage a police officer approached management and had an informal discussion about the high wind on a high fire danger day and anyone camping out near the dead trees etc may want to be careful," she said.

"This was purely safety advice and nothing more. There was no evacuation by police at any stage."

Hack has contacted the organisers of the Wild Horses Festival for comment.