Australia’s energy minister has urged households in New South Wales – a state that includes the country’s biggest city Sydney – to switch off their lights in the face of an energy crisis.
Chris Bowen says people should not use electricity for two hours every evening if they “have a choice”.
However, he added he was “confident” that blackouts could be avoided.
It comes after Australia’s main wholesale electricity market was suspended because of a surge in prices.
Mr Bowen asked people living in New South Wales to conserve as much power as possible.
“If you have a choice about when to run certain items, don’t run them from 6 to 8 [in the evening],” he said during a televised media conference in Canberra.
Australia is one of the world’s biggest exporters of coal and liquefied natural gas but has been struggling with a power crisis since last month. Three quarters of the country’s electricity is still generated using coal. It has long been accused of not doing enough to cut its emissions by investing in renewables.
In recent weeks, Australia has felt the impact of disruptions to coal supplies, outages at several coal-fired power plants and soaring global energy prices.
Flooding earlier this year hit some coal mines in New South Wales and Queensland, while technical issues have cut production at two mines that supply the market’s biggest coal-fired station in New South Wales.
Around a quarter of Australia’s coal-fired electricity generating capacity is currently out of service due to unexpected outages and scheduled maintenance.
Some electricity producers have seen their costs soar as global coal and gas prices have jumped due to sanctions on Russia over its invasion of Ukraine.
Meanwhile, demand for energy has jumped amid a cold snap and as Australia’s economy opens up after Covid-19 restrictions were eased.
All of this has helped drive up power prices on the wholesale market to above the A$300 (£173; $210) per megawatt hour price cap set by the market’s regulator, the Australian Energy Market Operator (Aemo).
However, that cap was below the cost of production for several generators, who decided to withhold capacity.