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High-resolution human mobility data reveal race and wealth disparities in disaster evacuation patterns

Hengfang Deng, Daniel P. Aldrich, Michael M. Danziger, Jianxi Gao, Nolan E. Phillips, Sean P. Cornelius () and Qi Ryan Wang ()
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Hengfang Deng: Northeastern University
Daniel P. Aldrich: Northeastern University
Michael M. Danziger: Northeastern University
Jianxi Gao: Rensselaer Polytechnic Institute
Nolan E. Phillips: Harvard University
Sean P. Cornelius: Ryerson University
Qi Ryan Wang: Northeastern University

Palgrave Communications, 2021, vol. 8, issue 1, 1-8

Abstract: Abstract Major disasters such as extreme weather events can magnify and exacerbate pre-existing social disparities, with disadvantaged populations bearing disproportionate costs. Despite the implications for equity and emergency planning, we lack a quantitative understanding of how these social fault lines translate to different behaviours in large-scale emergency contexts. Here we investigate this problem in the context of Hurricane Harvey, using over 30 million anonymized GPS records from over 150,000 opted-in users in the Greater Houston Area to quantify patterns of disaster-inflicted relocation activities before, during, and after the shock. We show that evacuation distance is highly homogenous across individuals from different types of neighbourhoods classified by race and wealth, obeying a truncated power-law distribution. Yet here the similarities end: we find that both race and wealth strongly impact evacuation patterns, with disadvantaged minority populations less likely to evacuate than wealthier white residents. Finally, there are considerable discrepancies in terms of departure and return times by race and wealth, with strong social cohesion among evacuees from advantaged neighbourhoods in their destination choices. These empirical findings bring new insights into mobility and evacuations, providing policy recommendations for residents, decision-makers, and disaster managers alike.

Date: 2021
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Citations: View citations in EconPapers (4)

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DOI: 10.1057/s41599-021-00824-8

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