Between 1970 to 2019, 44% of all disasters and 31% of all economic losses were flood related . Observed flood risks changes in recent decades are often caused by human factors such as increased urbanisation and population growth rather than climate change alone . There is medium confidence that flood vulnerability varies among various regions and countries  , reflecting differences in GDP, severity and characteristics of hazard and political and social conditions . Flood vulnerability has decreased with economic development in many regions, while increased exposure has elevated risk in some places . Global annual mean expected damage considering the current flood protection standard is estimated to be USD 54 million under the climate of 1976-2005 and unevenly distributed . Similar estimation using different models shows an increase of flood exposure in the past   .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report