Police have called in the dive squad to search waterways around Whitianga on Tuesday as they continue looking for missing teen Lucas Cochrane.
The 19-year-old Aucklander disappeared from a function at the Whitianga Fire Station on Saturday night.
Waikato East Area Commander Inspector John Kelly says police won't stop looking for Lucas.
"Unfortunately, we do not have any positive leads on where he might be.
"As you would expect, the family of Lucas are upset but we continue to support his relatives during this stressful time."
There was heavy rain flooding rivers in the Coromandel at the weekend. Although more rain is forecast for the next few days in Whitianga, the search is expected to continue.
CCTV footage has been checked and more recordings are being examined, police say.
Mr Cochrane is described as European, 182cm tall and of medium build with short sandy coloured hair.
When he was last seen, he was wearing a black t-shirt, dark blue jeans, black peaked cap and white Nike shoes with red and blue on them.
"It rocks a small place like this, everybody's shocked, we think 'what if it was one of our own?'" owner of Espy cafe, Bev Wood told Newshub.
Family and friends of Mr Cochrane visited the cafe on Monday afternoon, putting up posters and talking to people, Ms Wood says.
"We all hope he's found safe and well. I've got young staff around the same age, it's rocked them and it's made them aware of keeping safe and in touch."
Anyone who has information about Mr Cochrane's whereabouts is asked to contact police immediately on 111.