In 2010, around 1 billion people around the world were living in floodprone areas, potentially exposed to either river or coastal flooding. This number is projected to increase to over 1.6 billion by 2050. Source: The geography of future water challenges, PBL, 2019
Flood occurrence is a count of the number of floods recorded from 1985 to 2011.
Sources: WRI Aqueduct 2014, Brakenridge, Dartmouth Flood Observatory 2011