Plumes of black smoke have been snapped billowing from the roof.
Sheds, caravans and a house were all taken by the blaze.
Some first responders worked "exhaustive hours".
The message comes after a chaotic Guy Fawkes night on Tuesday.
Fire and Emergency received 88 call outs across the NZ.
"It's wholesome family fun."
With hot, dry conditions at the moment, it only takes one spark to start a fire.
Investigators will probe the cause of the fire.
Fifteen to 20 million litres of water was pumped into the sea.
At one point, the fire stretched over 10 hectares.
Thirty-three people were treated by paramedics at the scene.
An Air NZ engineer is dealing with the problem.
"Just think of it as the Survivor challenge - but this is for your life not money."
SkyCity says WorkSafe and independent investigations have deemed it safe, five days after the big blaze.