This is a fascinating discussion, via the IMF:
The Earth’s warming affects countries very unequally. Even though low-income countries have contributed very little to greenhouse gas emissions, they would bear the brunt of the adverse consequences of rising temperatures, since they tend to be situated in some of the hottest parts of the Earth.
Analyzing historical patterns across 180 countries over the past 65 years reveals a non-linear relationship between temperature and growth, confirming previous findings by Burke, Hsiang, and Miguel (2015) in an expanded database. This relationship implies that in countries with a relatively hot climate, such as most low-income countries, a rise in temperature lowers per capita output in a long-lasting manner.
Source: International Monetary Fund