A young man has been killed clearing up a firebreak at Rolleston - a small town in central Queensland.

The 21-year-old became trapped under a tree about 07.30pm last night.

Police say it appears he'd been attempting to cut the tree with a chainsaw when it fell on top of him.

Three other men nearby tried to help, but he died at the scene.

Firfighters put out spot fires north-west of Gracemere. (9NEWS)

A home in Kabra was completely decimated by the blaze. (AAP)

It's the only reported fatality so far during the bushfire crisis ravaging Queensland. Premier Annastacia Palaszczuk offered her condolences to the family.

"It goes to show that everyone is doing everything they can to save their home and their properties," she told reporters.

Ms Palaszczuk is in Finch Hatton, west of Mackay, visiting a local command centre.

"It is a very very sad day for that family," she said.

"It's a terrible, terrible tragedy for the entire family, we really feel for them," added State Disaster Coordinator Bob Gee.

Crews in Mackay have worked through the night to save homes and businesses as 120 blazes continue to burn across the state.

10 people, including six children, were airlifted to safety as the blaze threatened the town and closed off the access road.

A man and three boys, one with a history of asthma, were rescued first and taken to Finch Hatton, with six more, including a baby, rescued in the second group

Conditions eased in the early morning, but more hot conditions have been forecast with residents bracing for another day on high alert.

Premier Annastacia Palaszczuk has warned Queenslanders to follow instructions from emergency services and follow alerts on your mobile phones if in fire affected areas. (AAP)

Temperatures are expected to build over the next four to five days, with the maximum to peak on Monday.

There is also another threat emerging off the coast of Australia.

A low-pressure system is forming near the Coral Sea, and there is a moderate chance of it developing into a cyclone next week.

A cyclone warning is in place, but it is currently tracking out to sea.

Authorities are warning people to pay attention to alerts on their phones for all the latest on the fires. (AAP)

In Deepwater, residents are still in evacuation centres, many are unsure if their homes are still standing.

A fire ban is in place for the Brisbane region until the end of Sunday.

A fire ban extends until Tuesday for parts of south-west Queensland.

The fire poses a threat to all lives directly in its path," the Queensland Fire and Emergency Services said as it issued the take shelter warning.

There have been no lives lost as fires raged in central Queensland this week but more than 100 are still burning around the state.

Meanwhile, Queensland police have warned arsonists face hefty jail sentences, after a second man in three days was arrested for allegedly attempting to start fires near Rockhampton.

The separate incidents were not related to the large Stanwell fire nearby, and the alleged firebugs were arrested before causing any serious damage.

No lives have been lost and property damage has so far been minimal in the crisis that has gripped the state this week but Queensland Fire and Emergency Services Commissioner Katarina Carroll says extreme conditions will be ongoing.

"We are not out of the woods. We've got a heatwave still with us for the next four days. We've got thunderstorms that interfere with how the fire spreads," she said.

"This is completely difficult and challenging circumstances to work in. We have never seen this in our state before."

QUEENSLAND FIRE UPDATES: KEY UPDATES

- One man has died clearing up a firebreak at Rolleston

- There are 120 fires are still active throughout central Queensland

- Queensland has 37 total fire bans across 37 government areas

- 8000 homes and almost 20,000 people have been threatened by the blazes

- Temperatures are set to reach up to 45 degrees in the coming days

- 15 firefighters have had to be treated for heat stress in the staggering conditions