It took less than six minutes for this 4WD to sink out of sight

Key points

• A grey four-wheel drive sank in floodwater covering a road in Morayfield, north of Brisbane, within about six minutes. ABC reporter Will Murray and bystander Daniel Hainey pulled the driver free after the vehicle was submerged.
• Flood researcher Amy Peden said people cannot judge the depth or speed of floodwater, and warned that rescues can cost would-be rescuers their lives.
• Queensland Fire and Rescue instructor Matt Kelemen advised occupants to lower windows or break side windows, as opening doors against floodwater is difficult.