Fire authorities are calling for a rethink of Australia's firefighting resources as fire seasons extend across the country.

Key points: Australia's fire season becoming longer and more intense, authorities say

Australia's fire season becoming longer and more intense, authorities say Increase in "erratic, intense" fires has been blamed on climate change

Increase in "erratic, intense" fires has been blamed on climate change Union says firefighting resources stretched to breaking point

Union says firefighting resources stretched to breaking point Calls for greater recruitment in local fire stations

As the end of summer approaches there is little relief expected for firefighters, with hot and dry conditions forecast to continue around Australia for weeks.

Fire authorities say the country's extending and worsening fire seasons, caused by climate change, are resulting in a struggle to staff fire stations for the first time.

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New South Wales firefighter Darin Sullivan says that after 20 years in the job, he has observed a trend of longer and more intense fire seasons in the last few years.

"When you are doing 24–48 hour campaigns, and sometimes longer more recently, it can be very fatiguing and very, very hard, arduous work," Mr Sullivan told The World Today.

"We are seeing that impact on our professional paid firefighters, we are seeing it on our volunteer firefighters."

Mr Sullivan has no doubt a hotter climate is to blame for the higher intensity and duration of fire seasons.

"Climate change definitely at our end appears to be having an impact on the cause of fires and certainly the duration and intensity of fires," he said.

"We've got fire seasons getting longer, the off-seasons are getting shorter and the fires that are occurring are getting more erratic and certainly more intense."

So far in the 2015–2016 fire season, eight people have died and more than 350 homes have been lost across Australia.

Mr Sullivan, also president of the Fire Brigade Employees Union, said conditions were stretching firefighting resources to breaking point.

For the first time, firefighting units were having to borrow staff from interstate just to keep stations operational, he said.

"We've had firefighters travel interstate to assist other fire services with the fires themselves, and that's always been the case," Mr Sullivan said.

"But what we are seeing now is a trend where the fires are becoming so catastrophic and so large — to try and deal with that the fire services are struggling to actually resource and staff their local fire stations.

"So the interstate deployments are not only coming down to help out with the fire itself but we are now seeing arrangements — Victoria and New South Wales have done this recently — where they have had to go interstate to help each other actually staff the fire stations."

Firefighters travel interstate to help local fire stations with stretched resources. ( Supplied: CFA )

Interstate firefighters 'can be recipe for disaster'

Australian Firefighters Climate Alliance spokesman Paul Gray said bringing staff in from interstate had its risks.

"Fire services manage it well with task forces, they keep it simple. But you can understand — if you drag somebody a couple of thousand kilometres from where they are used to, terrain differences, environment differences, weather differences — there can be a bit of a recipe for disaster if it's not managed well," Mr Gray said.

A firefighter himself, Mr Gray said Australia needed more fire fighters, but they were not being hired.

"In fact, Queensland had a freeze on recruitment for close to 18 months under the previous government," he said.

"The more fire crews you have on the ground, the more peak response you can have towards major instances and stop them getting out of control.

"It also allows you to rotate and rehabilitate crews at protracted incidents and protracted fire seasons."

Mr Gray said firefighters also needed better equipment to help cope with hotter conditions and longer days.

Audit of fire management resources needed

Both Mr Sullivan and Mr Gray agree that a rethink is needed into how Australia manages its firefighting resources.

"We think there needs to be a ground-up approach to this. We think that all fire services in Australia really need to have a bit of a clean sweep," Mr Sullivan said.

"I know that in most jurisdictions there is a duplication of service. We've got overlapping and duplicated uses of urban firefighters and our rural fire fighters, so [we need] a ground-up approach to restructures.

"We think we are going to need more firefighters on the ground, especially our permanent paid firefighters, because whether it's terrorism, whether it's catastrophic bushfires effected by climate change, we are going to need more resources on the ground to fight these fires."