According to a recent United Nations climate change report, a rise of temperatures by 1.5 - 2°C will scorch northern Australia, kill the Great Barrier Reef, cause snowfields to disappear and cause flash floods from high intensity rainfall.
Frequency of heatwaves will increase by 85 percent, with up to 70 percent more fire weather days by 2050 in some regions, causing a collapse of alpine ash, snowgum woodland, pencil pine and northern jarrah forests.
If global temperatures increase by 3°C, think Armageddon. We must come together and take Climate Action “that transforms virtually every human activity - now!” says Climate Activist Herman Gyr.
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UN report https://www.ipcc.ch/report/ar6/wg2/