Australian bushfires: NZ to send more firefighters

New Zealand will send an extra 22 firefighters to help Australia battle its historic blazes. 

A state of emergency has been declared in New South Wales and Victoria, with at least 17 dead and millions of hectares burned. 

"The devastation caused by these fires is taking a substantial toll on our Australian neighbours and we will continue to do what we can to assist as they deal with this extremely dynamic, dangerous and ongoing situation," Prime Minister Jacinda Ardern said on Friday.

"New Zealanders around the country have expressed their condolences to those who have lost loved ones and sympathy to all affected, and I extend mine too. It's simply devastating to see the scale of the loss."

The contingent will be made up of 20 firefighters, a strike team leader and a liaison officer. They'll leave for Australia on January 8, after a request was made earlier this week. 

"Even before we saw the smoke from the fires across the ditch, I know we were already thinking of our friends and neighbours in Australia," she wrote on Facebook.

"It’s been devastating to watch from afar, I can only imagine what it feels like to experience it directly."

Since October, 157 Kiwis have been deployed across the ditch. 

"These fires continue to be fought in some of the most challenging conditions ever and Fire and Emergency New Zealand and its partners are providing valuable assistance," said minister Tracey Martin. 

"I thank them for their incredible efforts and wish them the best for the tough and complex work they are doing."

The Government is open to sending more firefighters and support if Australia needs it, she added. 

The weather forecast isn't good, with temperatures expected to rise over the next couple of days.