A young woman killed in a horror house fire has been identified as Isabella Nicholls.

The 21-year-old woman was critically injured after a fire broke out at her King St home in Buderim about 7.35pm on Sunday.

WATCH THE VIDEO ABOVE: Woman dies after unit fire in Buderim home

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Exclusive video obtained by 7NEWS captures a voice shouting, “Everyone get out, there’s a fire!”

Neighbours told 7NEWS the woman was in the shower when she noticed the unit was on fire, before running through the flames and out of the building.

Karen Brown was among the first on the scene, calling Triple-0 after discovering Nicholls critically injured.

“She was very badly injured, to look at ... oh mate, so sad,” Brown said.

The cause of the blaze has yet to be determined. Credit: Supplied

Exclusive vision captures the moment neighbours raised the alarm as flames engulfed the home. Credit: Supplied

Another neighbour said the incident had left her young daughter shaken.

“It was something else, my little girl was just terrified,” she said.

Nicholls was helped by shocked neighbours until paramedics arrived and treated her for critical burns to her face, arms, legs and abdomen.

She was rushed to the Royal Brisbane and Women’s hospital, however, died from her injuries on Monday morning according to police.

The entire unit complex was evacuated and a public safety order was put in place due to the burning units close proximity to a petrol station.

Paramedics treat the critically injured woman at the scene of the Buderim house fire before she was taken to hospital with life-threatening burns. Credit: 7NEWS

Another woman in her 30s was assessed by paramedics but was uninjured.

Neighbours said two miniature dachshunds are also believed to have died in the fire.

Detective Senior Sergeant Robert Lowry said the scene was “quite confronting for emergency services” and that support was being provided.

Five fire crews battled the blaze for about an hour amid fears it could spread to neighbouring units and a nearby service station. Credit: 7NEWS

Two dog are also believed to have died in the fire. Credit: 7NEWS

“We also feel for the family of the deceased lady, and we understand the family is receiving support,” he said.

Lowry said the investigation is still in its early stages and a crime scene had been established, with investigations continuing into how the fire began.

Anyone who may have relevant information, CCTV or dashcam footage is urged to come forward.