‘Unimaginable trauma’: Parents pay tribute to two kids killed in NSW house fire

The family of the two children who died in a house fire in NSW's Hawkesbury region have released an emotional statement about their "unimaginable tragedy".

The siblings have been named as Myla Summer-Lea Hughes, 10, and three-year-old River William Higgins.

"Today, with shattered hearts, we share the devastating loss and unimaginable trauma our family has suffered following the tragedy at Bowen Mountain," parents Skye Hughes and David Higgins said in a statement.

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"Our family's world has been forever changed."

David and three other children managed to escape the blaze at the home in Bowen Mountain, about 77 kilometres north-west of Sydney, early on Monday.

"At the time of the fire, five of the children were at the Bowen Mountain home, while one child was safely with their mother, Skye, in Queensland, where the family had been preparing to reunite and begin a new chapter together in their new home."

"This heartbreaking reality makes this unimaginable loss even more devastating for all who loved them."

An online fundraiser has been set up with the parents' permission.

"These precious lives were deeply loved, and this unimaginable tragedy has left the family facing profound grief, trauma and overwhelming loss," the fundraising page says.

The parents also thanked emergency workers, doctors and nurses, family, friends and the local community for their support.

"As we mourn this heartbreaking tragedy and navigate an unimaginable loss, we respectfully ask the media and the public to honour our privacy and protect our children," they said.

"We ask for the dignity to grieve and support one another without further intrusion and will not be commenting further at this time. 

"Thank you for your understanding, compassion and respect."

An appeal is being held for funds to help cover the costs of funerals and memorials, emergency accommodation, necessities, trauma counselling and the loss of the family home. 

The fundraiser has already received more than 600 donations and raised more than $55,000. 

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