That's the warning in a new climate change study, that says Australian cities are on track for unprecedented extreme heat, even if the world meets its Paris climate change targets.
Australian summers to reach new extremes

The sun rises over Captain Cook Bridge as Sydneysiders head toward another hot weekend, Sydney, Friday, September 22, 2017. (Dean Lewins) Source: AAP
Melbourne and Sydney could be experiencing 50-degree days by the turn of the century.
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