There is negligible evidence that existing responses are adequate to reduce climate risk . There is some evidence of global vulnerability reduction, particularly for mortality and economic losses due to flood risk and extreme heat . Evidence on the effectiveness of specific adaptations remains limited. There is negligible robust evidence to assess the overall adequacy of the global adaptation response to address the scale of climate risk. No studies have systematically assessed the adequacy and effectiveness of adaptation at a global scale, across nations or sectors, or for different levels of warming. 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report