Ten homes were saved from a fire in Christchurch.
Video shows the scale of the blaze.
Seven helicopters are responding.
Residents are told to keep their windows closed.
It's threatening homes and motorists have been asked to avoid the area.
"It's very easy for mums and dads to forget that children are very inquisitive."
A total fire ban is in place for the area.
Firefighters have spent the morning battling the blaze at Māngere Mountain.