The crew has been working around the clock to assist people trapped by the extreme weather event.
Otago Regional Rescue Helicopter pilot Andrew Girven said two craft from the service had been sent up to assist with the response to the cyclone and were operating from Hastings Aerodrome.
They had been extremely busy since they arrived on Tuesday, operating alongside helicopters from across the central North Island and Royal New Zealand Air Force NH90s.
As soon as they arrived they started flying rescue missions until they had to stop due to bad weather.
At dawn yesterday they started flying with a list of locations where people had been reported being in distress or on roofs.
While floodwaters had receded overnight, the crew checked on people and brought them back to the aerodrome if they needed help.
Some had to be winched to safety as there was a lot of silt and debris over roads.
One woman had been stuck in mud and was steadily sinking until she was winched to safety by paramedic Anthony Hoets, Mr Girven said.
When they first arrived there had been no electricity or cellphone reception, although both had improved.
"The scale of devastation is massive," Mr Girven said.
There had been a steady stream of jobs for them to attend and everyone was working well as a team.
Fire and Emergency New Zealand (Fenz) and Civil Defence had set up a control point at the aerodrome and St John staff were on site, treating people who did not need to be taken to hospital, Mr Girven said.
Emergency Management Otago stakeholder engagement adviser Erica Andrews said two team members were being deployed today, one to Northland and another to Auckland.
Others were waiting deployment details, Ms Andrews said.
A Dunedin City Council spokesman said staff were on standby and would be sent if they were required.
A Fenz spokeswoman said a career crew was sent from Dunedin to Christchurch, as the city had sent 23 urban search and rescue staff to help with the cyclone response.
Police declined to say if any staff from Southern district were being sent to assist.
