Migration for climate reasons happens when people move because of environmental changes. These changes can include droughts, floods, storms, or rising sea levels. This type of migration is becoming more common in the 21st century.

In low-lying island regions, some communities relocate as sea levels rise. In dry regions, farmers may move when water becomes scarce. These movements can be temporary or permanent, depending on conditions.

Migration linked to climate is studied using environmental data, maps, and population records. It shows how changing environments affect where people live.