During 2020, more than 30 million people were driven from their homes by extreme weather conditions. That number is expected to rise as climate change acts as a “threat multiplier” for migration, through its intersection with economic, political and social drivers of mobility.
Sudden onset climate hazards like floods and cyclones, and slow-onset climate hazards like sea level rise and drought can trigger people to migrate.
Whether people move, who moves, and how they move depends however on many factors including socio-economic status, social connections, legal barriers to movement and their capacity to move in terms of health and wealth.
Climate mobility can be rural-urban migration, displacement, planned relocation, or cross-border migration. In other situations, people may be immobile or become trapped, meaning they cannot move to another location.