Development of a heat vulnerability index for New York State

Area of Science:

• Environmental science
• Public health
• Urban planning

Background:

• Extreme heat events are increasing in frequency and intensity in New York State (NYS).
• Heat-related morbidity and mortality are significant public health concerns, disproportionately affecting vulnerable populations.
• Regional sociodemographic and environmental factors influence individual adaptive capacity to heat, contributing to varied vulnerability across NYS.

Purpose of the Study:

• To develop a comprehensive Heat Vulnerability Index (HVI) for New York State.
• To identify specific populations and geographic areas within NYS most vulnerable to extreme heat.
• To provide a tool for targeted public health interventions and climate adaptation planning.

Main Methods:

• Utilized census tract-level environmental and sociodemographic data.
• Employed principal component analysis to reduce 13 variables into four key components: social/language, socioeconomic, environmental/urban, and elderly/social isolation vulnerability.
• Mapped the cumulative HVI across NYS (excluding NYC) to visualize spatial heat vulnerability.

Main Results:

• The HVI revealed significant spatial variation in heat vulnerability across NYS.
• Metropolitan areas exhibited the highest vulnerability, with language barriers and socioeconomic disadvantage as primary contributing factors.
• Preliminary analysis showed a correlation between high HVI scores and higher rates of heat stress, validating the index's reliability.

Conclusions:

• The developed NYS HVI effectively demonstrates spatial disparities in heat vulnerability.
• Mapping the HVI facilitates the rapid identification of at-risk regions requiring targeted interventions.
• The HVI will serve as a crucial planning tool for allocating resources, such as cooling centers and heat advisories, to mitigate the health impacts of extreme heat.