Table 1.

Indicators and the domains of vulnerability incorporated into HGBEnviroScreen.

Domain (% Weight of Overall Score) Indicator (Fractional Weight within Domain)	Indicator Unit for Each Census Tract	Ref.
Social Vulnerability (20%)
Socioeconomic status (1/6)	% ile index	[23]
Household composition and disability (1/6)	% ile index	[23]
Minority status and language (1/6)	% ile index	[23]
Housing and transportation (1/6)	% ile index	[23]
Without health insurance (1/6)	% of population	[23]
Modified food retail environment index (1/18)	100—MFREI Score 1	[24]
Food desert low access (1/18)	Sum of two low access flags	[25]
Low food security (1/18)	% of population	[26]
Baseline Health (20%)
Childhood asthma (1/6)	% crude prevalence	[17]
Stroke (1/6)	% crude prevalence	[17]
Chronic obstructive pulmonary disease (1/6)	% crude prevalence	[17]
Coronary heart disease (1/6)	% crude prevalence	[17]
Life expectancy (1/6)	100—Life exp in years 1	[18]
Proximity to hospitals (1/6)	100—# within 5 km 1	[27]
Environmental Exposures and Risks (20%)
Risk-screening environmental indicators (1/3)	Aggregated 2015–2017 Score	[28]
National Air Toxics Assessment (NATA) Cancer (1/9)	Cancer risk	[20]
NATA Respiratory Tract (1/9)	Hazard index	[20]
NATA Reproductive (1/9)	Hazard index	[20]
PM2.5 Community Multiscale Air Quality (CMAQ) (1/6)	μg/m3	[21]
PM2.5 Satellite (1/6)	μg/m3	[22]
Environmental Sources (20%)
Major roads (1/10)	% ile based on # within 1 km	[29]
Cement batch plants (1/10)	% ile based on # within 1 km	[30]
Metal recyclers (1/10)	% ile based on # within 1 km	[30]
Petrochemical and oil refineries (1/10)	% ile based on # within 1 km	[19]
Power plants (1/10)	% ile based on # within 1 km	[31]
Superfund sites (1/10)	% ile based on # in census tract	[32]
Leaking petroleum storage tanks (1/10)	% ile based on # in census tract	[32]
Facilities with risk management plans (RMP) (1/10)	% ile based on # in census tract	[33]
Accident events reported in RMP (1/10)	% ile based on # in census tract	[33]
Shelter-in-place events reported in RMP (1/10)	% ile based on # in census tract	[33]
Flooding (20%)
100 year flood plain (1/6)	% ile based on fraction of area	[29]
500 year flood plain (1/6)	% ile based on fraction of area	[29]
Harvey damage assessment “Affected” (1/12)	% ile based on # in census tract	[34]
Harvey damage assessment “Minimal” (1/12)	% ile based on # in census tract	[34]
Harvey damage assessment “Major” (1/6)	% ile based on # in census tract	[34]
Harvey damage assessment “Destroyed” (1/6)	% ile based on # in census tract	[34]
Families filing Harvey damage claims (1/6)	% of population	[35]

¹ 100 minus the indicator was used so that higher values represent more vulnerability.