The flooding of an empty building pit is believed to have played a key role in the formation of two sinkholes the opened up next to an apartment block in Sydney.

The appearance of two potentially hazardous sinkholes in a pair of adjacent housing blocks situated in western Sydney has resulted in the evacuation of around 50 local residents. The two sinkholes appeared mere centimetres away from an apartment block in the centre of Parramatta following stormy weather in Sydney’s west…