Flood risk perceptions and future migration intentions of Lagos residents

Abstract

Coastal communities across the world face intense and frequent flooding due to the rise in extreme rainfall and storm surges associated with climate change. Adaptation is therefore crucial to manage the growing threat to coastal communities and cities. This case study focuses on Lagos, Nigeria, one of the world's largest urban centers where rapid urbanization, poor urban planning, degrading infrastructure, and inadequate preparedness compounds flood vulnerability. We situate flood risk perceptions within the context of climate-induced mobilities in Lagos, which no study has done, filling a necessary knowledge gap. Furthermore, we apply a unique approach to flood risk perception and its linkage to migration, by using three measures of risk – affect, probability, and consequence, as opposed to a singular measure. Results show that the affect measure of flood risk perception is significantly higher than probability and consequence measures. Furthermore, flood risk perception is shaped by prior experiences with flooding and proximity to hazard. The effect of proximity on risk perception differs across the three measures. We also found that flood risk perceptions and future migration intentions are positively correlated. These results demonstrate the usefulness of using multiple measures to assess flood risk perceptions, offering multiple pathways for targeted interventions and flood risk communication.