Police have appealed for the people walking on Cowcher Way when a young woman ran screaming from her Medina home after being set on fire to come forward.

Arson Squad detectives are continuing their investigation into the incident on Sunday afternoon, and said several people were walking on the street at the time.

Police allege mother of two, Andrea Atkins-Greed, was doused in petrol and set on fire by Daniel Bolderson, 37.

She received burns to about 35 per cent of her body and remains in a stable condition in the Fiona Stanley Hospital burns unit.

Neighbours told of her horrific screams as she ran from the home in search of help.

Mr Bolderson has been charged with grievous bodily harm and criminal damage by fire and also remains in hospital.

Anyone with information is urged to call Crime Stoppers on 1800 333 000.