However, new evidence has emerged since the AR5 that further documents widespread effects of weather fluctuations and extreme events on migration . Numerous studies find significant links between temperature or precipitation anomalies, or extreme weather events such as storms or floods, and internal as well as international migration . Internal displacement of millions of people every year is triggered by natural hazards, mainly floods and storms . The effects of weather fluctuations and extremes on migration are considered more important for temporary mobility and displacement than permanent migration, and more influential on short-distance movement, including urbanisation, than international migration . Importantly, these links are conditional on the socioeconomic situation in the origin; for example, poor populations may be 'trapped' and not able to migrate in the face of adverse climate or weather conditions . Many studies have also explored the channels through which climate or weather influence migration, and have identified incomes in the agricultural sector as one of the main channels . In particular, declines in agricultural incomes and employment due to changed weather variability may foster increased rural-urban movement, and the resulting pressures on urban wages in turn foster international migration . Another possible but controversial channel is violent conflict, which may be fostered  by adverse climate conditions such as drought, and in turn lead to people seeking refugee status, although evidence of such an indirect effect is weak .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report