(image: Channel 9)
Fire crews have been kept busy across Town overnight.
A deliberately lit mattress in the stairwell of a block of units at Salisbury Downs forced a female resident to jump to safety from her second storey home.
She's been treated in hospital for minor injuries.
While a male resident suffered smoke inhalation in the incident.
Police are trying to track down the arsonist responsible.
At Paralowie some units have also gone up in flames.
Luckily, those inside the Waterloo Corner Rd home managed to escape unharmed but not before extensive damage was caused to the property.