"Backpackers" Visa Extended
The Government has extended the scope of the backpacker visas (subclass 417) to include work in bushfire areas.
https://immi.homeaffairs.gov.au/visa...rk-holiday-417
Costs you $485 and you have to be under 30 y/o (35 if you are French, Canadian or Irish) and must working specified industries. These have been increased to include construction.