kilometre

Residents also reported hearing the explosion from several kilometres away.

Icebergs as large as cities, potentially tens of kilometres wide, once roved the coasts of the UK, according to scientists.

Emergency teams were able to retrieve the boy at South West Rocks, about 400 kilometres north of Sydney, but he died at the scene.

He added that there had been regular safety checks on the cable car line which runs three kilometres from the town to the top of the mountain.

He walks two kilometres along a dry riverbed, a stark reminder of the region's deepening water crisis.