Jesse was flown from a New Zealand hospital for treatment in Sydney at the weekend and could wake to the news his entire family is gone.
It is understood he suffered burns to 80-90 per cent of his body and is currently in a coma in Sydney's Royal North Shore hospital, where relatives have visited him according to The Australian.
The 19-year-old graduated Sydney's Marist College in 2018, and is a student at the University of Technology, Sydney.
Strong winds and rain have made finding the final bodies extremely difficult, with an Eagle helicopter being forced to return to shore to this morning after leaving at dawn to continue the search.