Abstract

Environmental heat is a growing public health concern in cities. Urbanization and global climate change threaten to exacerbate heat as an already significant environmental cause of human morbidity and mortality. Despite increasing risk, very little is known regarding determinants of outdoor urban heat exposure. To provide additional evidence for building community and national-scale resilience to extreme heat, we assess how US outdoor urban heat exposure varies by city, demography, and activity. We estimate outdoor urban heat exposure by pairing individual-level data from the American Time Use Survey (2004–2015) with corresponding meteorological data for 50 of the largest metropolitan statistical areas in the US. We also assess the intersection of activity intensity and heat exposure by pairing metabolic intensities with individual-level time-use data. We model an empirical relationship between demographic indicators and daily heat exposure with controls for spatiotemporal factors. We find higher outdoor heat exposure among the elderly and low-income individuals, and lower outdoor heat exposure in females, young adults, and those identifying as Black race. Traveling, lawn and garden care, and recreation are the most common outdoor activities to contribute to heat exposure. We also find individuals in cities with the most extreme temperatures do not necessarily have the highest outdoor heat exposure. The findings reveal large contrasts in outdoor heat exposure between different cities, demographic groups, and activities. Resolving the interplay between exposure, sensitivity, adaptive capacity, and behavior as determinants of heat-health risk will require advances in observational and modeling tools, especially at the individual scale.

Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalHealth and Place
Volume54
DOIs
StatePublished - Nov 1 2018

Fingerprint

demography
heat
Hot Temperature
Demography
exposure
city
Extreme Heat
determinants
Recreation
morbidity
Urbanization
Climate Change
Psychological Adaptation
health risk
garden
public health
global climate
urbanization
recreation
Young Adult

Keywords

  • Activity
  • Exposure
  • Heat
  • Outdoor
  • Urban

ASJC Scopus subject areas

  • Health(social science)
  • Geography, Planning and Development
  • Sociology and Political Science
  • Public Health, Environmental and Occupational Health
  • Life-span and Life-course Studies

Cite this

Heat exposure during outdoor activities in the US varies significantly by city, demography, and activity. / Hoehne, Christopher G.; Hondula, David; Chester, Mikhail; Eisenman, David P.; Middel, Ariane; Fraser, Andrew; Watkins, Lance; Gerster, Katrina.

In: Health and Place, Vol. 54, 01.11.2018, p. 1-10.

Research output: Contribution to journalArticle

Hoehne, Christopher G. ; Hondula, David ; Chester, Mikhail ; Eisenman, David P. ; Middel, Ariane ; Fraser, Andrew ; Watkins, Lance ; Gerster, Katrina. / Heat exposure during outdoor activities in the US varies significantly by city, demography, and activity. In: Health and Place. 2018 ; Vol. 54. pp. 1-10.
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