Table 1:

Details of the 8 heat-related social vulnerability variables under 4 dimensions of vulnerability that used in this study.

Dimension of Vulnerability	Variables Name	Details
Extreme Ages	Older ages	Population >= 55 years old
	Infants	Population 0 – 5 years old, as to represent children under aged of elementary school’s entry
Household Characteristics	People in old houses	Number of households living in housing built prior to 1960
	People in bad living environment	Number of households living in multi-story apartment buildings or mobile homes, as to represent population living in a location with high-risk building design during an extreme heat event
Social Status	Low education population	Population with fairly low education level (without a diploma nor a degree)
	People living alone	Number of single-person household
Economic Status	Low income population	Population with household income less than $20,000
	Unemployed	Unemployment rate