An alarming United Nations report released Tuesday said global temperatures are on track to rise as much as 3.9°C by the end of the century, meaning only drastic and unprecedented emissions reductions can stave off the most devastating consequences of the climate crisis.

The annual Emissions Gap report (pdf) from the U.N. Environmental Program (UNEP) warns that nations’ commitments under the Paris climate accord — from which U.S. President Donald Trump began formally withdrawing this month — are not nearly sufficient to bring about the widespread changes needed to avert climate catastrophe.

“It is evident that incremental changes will not be enough and there is a need for rapid and transformational action,” the report states. “By necessity, this will see…