Two children who died in a horrific house fire have been identified in a fundraiser set up to support their family deal with the loss.

Myla Summer-Lea Hughes, 10, and River William Higgins, three, have been named as the two victims of the tragic house fire at Bowen Mountain in Sydney’s far north-west on Monday.

Their names were made public in an online crowdfunding campaign set up by a family friend with the full support of parents Skye Hughes and David Higgins, according to the fundraiser page.

The GoFundMe campaign had reached nearly $55,000 on Thursday afternoon, with the campaign stating all money will go to funeral expenses, living costs and counselling for the grieving family.

“These precious lives were deeply loved, and this unimaginable tragedy has left the family facing profound grief, trauma and overwhelming loss,” fundraiser organiser Natasha Holden said.

Bowen Mountain house fire victims, three-year-old River William Higgins (left) and 10-year-old Myla Summer-Lea Hughes (right). Photo: AAP

The family members who survived the blaze, including Higgins and three other children who have not been named, were discharged from Nepean Hospital on Tuesday.

Before the fire, Hughes had moved to Queensland with one of her children. The rest of the family was meant to fly up to join her on the day their previous home went up in flames.

“This tragedy has forever changed our family, but the extraordinary support of our community has reminded us that we do not stand alone,” Hughes and Higgins said in a joint statement.

“Your kindness has carried us through our darkest hours, and we are profoundly grateful for every act of support.”

Hughes and another of the couple’s children were already interstate when the blaze broke out.

“This heartbreaking reality makes this unimaginable loss even more devastating for all who loved them,” the parents said.

They also thanked first responders for their “tireless efforts”.

The deadly fire, which led to the collapse of the roof of the family’s house, has triggered an outpouring of support from the tight-knit community of less than 2000.

Local federal MP Susan Templeman thanked firefighters and paid tribute to the family.

“News of two deaths and others taken to hospital after a house fire at Bowen Mountain is deeply distressing,” she wrote on social media.

“Sincere condolences to the family and local residents in this close-knit Bowen Mountain community.”

The fire is not being treated as suspicious.

NSW Rural Fire Service Superintendent Jonathon Hill said the blaze had burned through much of the home’s roof cavity and caused structural damage by the time firefighters arrived. It took about 60 firefighters more than an hour to bring the blaze under control, although many were forced to withdraw before the roof caved in.

-with AAP