Fire tore through a processing plant on Monday night.
The fire service has issued a warning for people to be careful, as they "could sink like it's quicksand".
The fire service says it's an important reminder not to drink and fry.
The Fire Service has dispatched a rope-rescue team to the Waitakeres.
A dog was rescued from the same property in Tokoroa.
They lured firefighters and police into a trap - then shot at them.
Four fire trucks responded to the blaze, which destroyed a unit.
Fire crews were called to the blaze on MacCaulay St in Addington around 2:25am.
He says the Fire service's response on the day was "appalling."
"We look back to understand and improve, not blame," Christchurch Mayor Lianne Dalziel.
More than 1000 hectares of land has been burned near Te Anau, and some businesses affected.