An explosion at Apache's Varanus Island gas plant in Western Australia on June 3 cut off 30 per cent of the state's domestic gas supply. Supplies to mines and industry in the Pilbara region (the heartland of Australian iron ore mining) fell by 45 per cent.

The supply disruption was exacerbated by an inability to start alternative forms of power generation - the coal fired Collie power station, for example, had damaged turbine blades and could not immediately return to service.

This has had a large impact on the local economy (the WA Chamber of Commerce and Industry estimates the crisis will have cost the state $6.7 billion, assuming energy supplies are fully restored by December) and makes an interesting case study of the effects of a sudden reduction in energy supplies.