As a deadly bushfire bears down on their town, people in a Fraser Island hamlet are advised to evacuate immediately.

On Monday evening, the Queensland Fire and Emergency Services warned individuals in The Oakes to evacuate as soon as possible via Eastern Beach.

People at the resort and village of Kingfisher Bay on the island were also advised to plan to leave on a watch and act as an alert as a nearby fire threatens to get worse.

The huge wildfire, which had already burned half of the world heritage-listed island, was burning south toward The Oakes on Monday evening. Earlier emergency warnings for Sidney Rocks and Happy Valley were posted on Monday.

"Those still in The Oakes should follow their survival plan for the bushfire," QFES said.

"Leaving immediately is the safest option, as it will soon be too dangerous to drive," QFES said in a Monday evening statement.

"Any person near The Oakes should leave the Eastern Beach area and head south to Eurong Resort."

"Conditions are now very dangerous and firefighters may soon be unable to prevent the fire from advancing. The fire may pose a threat to all lives directly in its path."

At noon on Monday, flames were less than 700m away in the Happy Valley.

Approximately 90 firefighters and 24 water bombers are attempting to defeat the fire that is raging in three locations around Fraser Island.

Earlier, QFES director Brian Cox said backburning around the outskirts of Happy Valley and constant waterbombing will ideally change the tide.

He cautioned that in the "tinder-dry environment" all week, heatwave conditions are expected to continue.

Those at the resort and village of Kingfisher Bay were alerted that a fire east of the resort could rapidly escalate and endanger properties so that they would be ready to evacuate.

Marie Bashir, a large air tanker from the NSW Rural Fire Service, is assisting with water-bombing operations on the island.

"We are preparing for the worst type of thing and we're going to try to hit it with everything we have got today, we are pulling out all stops," Mr. Cox told ABC TV.

"We hope that a million liters of water we dropped yesterday will again be dropped today on that particular township area, and can hopefully save that town."

A charter flight over the island was taken by conservationist Cheryl Bryant to assess the animal populations and fire damage on Monday.

The spokeswoman for Save Fraser Island Dingoes painted a grim picture, saying that in burnt-out areas there were no signs of life.

"It's still unknown, and we're hoping there will be an inquiry, and we're hoping there will be something that will let people over on the island and decide what animals are still surviving."

"We would have liked to have seen ... animals and especially the dingoes around the beach but at this time of the day it is pretty difficult because they're not likely to be out and about."

Since mid-October, the fire on Fraser Island, also known as K'gari, has been burning.