Ratings firm S&P Global, which gives countries credit scores based on the health of their economies, published a report on Tuesday looking at the likely impact of rising sea levels and more regular heat waves, droughts and storms.
Central Asia, the Middle East and North Africa and Sub-Saharan Africa regions all face sizeable losses too. "One thing that really jumps out is the need for international support for many of these parts of the world." S&P's Sifon-Arevalo said that some countries have already suffered credit ratings downgrades due to extreme weather, such as some Caribbean Islands after major hurricanes.