Seriously ugly: Hereâs how Australia will look if the world heats by 3°C The sum of current commitments under the Paris climate accord puts Earth on track for 3â of warming this century. Text Size: A+ Imagine, for a moment, a different kind of Australia. One where bushfires on the catastrophic scale of Black Summer happen almost every year. One where 50â days in Sydney and Melbourne are common. Where storms and flooding have violently reshaped our coastlines, and unique ecosystems have been damaged beyond recognition â including the Great Barrier Reef, which no longer exists. Frighteningly, this is not an imaginary future dystopia. Itâs a scientific projection of Australia under 3â of global warming â a future we must both strenuously try to avoid, but also prepare for.