The World Bank Group is forecasting that in less than three decades more than 200 million people could be forced to migrate from where they live and work because of climate change.
A report released on Monday said the shift will involve 216 million people across six world regions.
Projections show that roughly 17 million people could be affected in Latin America and the Caribbean by 2050. This would affect work and productivity, especially for small island developing states.
The report says hotspots of internal climate migration could emerge as early as 2030, and continue to spread and intensify by 2050.
The World Bank Group says immediate and concerted action to reduce global emissions, and support green and resilient development could reduce the scale of climate migration by as much as 80 per cent.