Four Defence force firefighters are joining the fight against the fires ravaging New South Wales.
Emergency services across the ditch have been battling more than 120 bush and grass fires, with many still uncontained.
Officer commanding the army's firefighting unit, Maj Kenny Long, says he expects a warm welcome from his exhausted colleagues.
"They're usually very hot and very dry, and usually the people that are already there are very tired."
More than 1000 firefighters have been deployed across the state.
Long says the extra heat will be a big challenge.
"It's 40C - we just don't see that in New Zealand. That's going to be a big challenge for them... especially while wearing personal protection equipment - long sleeves and helmets."
The blazes in Australia are a "hell of a lot bigger" than the biggest he's seen here in recent years - February's wildfires in Nelson.
A few dozen New Zealand Fire and Emergency firefighters have already joined the fight, working 14-hour shifts.
The early arrival of fierce bushfires in the southern spring has already claimed several lives and destroyed nearly 300 homes over the past week. NSW Police said a 51-year-old man has been charged after allegedly lighting a fire which is now out of control in the state's Northern Tablelands.
There were still 59 bush and grass fires in New South Wales as of Saturday morning, with 13 yet to be contained, according to NSW Rural Fire Service.
Firefighters strengthened overnight containment lines by back burning around the Gospers Mountain fire, which is blazing across more than 100,000 acres (156 square miles) near Sydney's northwest outskirts. Back burns are fires deliberately lit to clear dry undergrowth.
Reuters / Newshub.
