Table 1.

Risk breakdown with factors and methods of assessment - summarizes the risk components, factors, and data sources used to measure the four types of Risk. Collectively, these four risk components comprise the Compound Hazard Risk of census tracts within Harris County.

Type of Risk	Risk Factors	Description	Data/Source of Analysis
COVID-19 Exposure	General Exposure	High and geographically diverse visitation	Weighted node degree centrality in network analysis, using all POIs
	COVID-19 Cases	Confirmed COVID-19 cases per 100,000 people	Harris County/Houston COVID-19 Cases Dashboard and 2010 Census data
Transmission Risk from Protective Actions	Presence of High-Risk POIs	Increased visits to grocery stores, gas stations, etc.	Weighted node degree centrality in network analysis, using only at high-risk POIs (as found in 3.1)
	Preparation Period Visits	Higher visitation before/during Harvey	Census tract visitation Z-score, averaged Aug 18th-25th, 2017
Social Vulnerability	Social Vulnerability	Community ability to prevent human suffering and financial loss	The overall ranking of the Social Vulnerability Index from CDC
Natural Hazard Vulnerability	Disrupted Access to Healthcare and critical infrastructure facilities	Loss of access to healthcare facilities due to flooding on roads	Percent of nodes disconnected from hospitals (directly and indirectly)