Higher temperatures caused by climate change may lead to the loss of 80 million jobs by 2030. These job losses would disproportionately impact poor countries which rely heavily on agriculture. Higher temperatures mean that people are not able to work as long due to heat stress concerns. When people are not able to work as much, this leads to a drop in productivity which costs the global economy trillions of dollars. The World Health Organization has estimated that heat stress will cause over 30,000 extra deaths each year between 2030 and 2050.
See "Rising heat stress could cost 80 million jobs by 2030 - U.N.", Lin Taylor, Reuters, July 1, 2019