Fig. 1: Geographical and socio-demographic information on evacuation from Hurricane Harvey. | Humanities and Social Sciences Communications

Fig. 1: Geographical and socio-demographic information on evacuation from Hurricane Harvey.

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

Fig. 1

a–c Illustrate the net evacuation intensity of each 100 × 100 m grid, defined as the difference \(\widehat K_s^{{\rm {net}}} = \widehat K_s^{{\rm {post}}} - \widehat K_s^{{\rm {pre}}}\), where \(\widehat K_s^{{\rm {post}}}\,\widehat K_s^{{\rm {pre}}}\) are KDE estimates of the probability density of home locations after (before) evacuation. These values are normalized to have zero mean and lie in the range [−1,1] (see the “Methods” section). As such, positive (blue) values correspond to an influx of resident above the baseline, with negative (red) values indicating an exodus. We compare the collective evacuation behaviour of all evacuees (a); evacuees who evacuated further than the 90% quantile (b); and evacuees who evacuated closer than the 10% quantile (c). The triangles in (a) represent reported fatalities and red dense cells indicate a greater rate of evacuation while the blue shaded cells reflect the likelihood as a relocation destination for the evacuees. The relative evacuation rates that compare the proportion difference for subgroups of populations are shown in (d)–(f) and an evident disparity in the evacuees’ economic and social compositions can be observed.

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