Perth Hills bushfire at 'critical' stage as firefighters struggle to contain massive blazeShareFire authorities battling a massive bushfire threatening lives and homes in the Perth Hills say the situation is at a critical stage as strong south easterly winds push the blaze towards houses on the northern edge of the fire.Incident controller Peter Sutton said the situation was extremely dangerous, with strong gusts fanning the flames and multiple breakouts ahead of the main fire."The situation has become quite critical as we speak," he told ABC Radio."We are getting reports of buildings under...…Perth Hills bushfire at 'critical' stage as firefighters struggle to contain massive blazeShareFire authorities battling a massive bushfire threatening lives and homes in the Perth Hills say the situation is at a critical stage as strong south easterly winds push the blaze towards houses on the northern edge of the fire.Incident controller Peter Sutton said the situation was extremely dangerous, with strong gusts fanning the flames and multiple breakouts ahead of the main fire."The situation has become quite critical as we speak," he told ABC Radio."We are getting reports of buildings under...WW…