Work

Transit rider heat stress and health: potential impacts of current and future extreme heat exposure in Atlanta, GA

Year: 2025

Type: article

Abstract: Transit is a crucial mode of transportation, especially in urban areas and for urban and rural disadvantaged communities. Because extreme temperatures often pose threats to the elderly, members of the disability community, and other vulnerable populations, this study seeks to understand the level of influence that extreme temperatures may have on transit users across different demographic groups. In this case study for Atlanta, GA, heat stress is predicted for 2019 transit riders (using transit rider activity survey data) and for three future climate scenarios, SSP245, SSP370, and SSP585, into the year 2100. The ThermoRoute Analyzer and TransitSim 4.0 models were applied to predict cumulative heat exposure and trip-level risk for 35 999 trip equivalents for an average Atlanta area weekday in the summer of 2019. The analyses show that under 2019 weather conditions, 8.33% of summer trips were estimated to be conducted under extreme heat. With the projected future climate conditions, the percentage of trips under extreme heat risk grows steadily. By 2100, 37.1%, 56.1%, and 76.4% are projected to be under extreme heat risk for low, medium, and high future climate projections (scenarios SSP245, SSP370, and SSP585), respectively. Under current weather conditions, Atlanta transit riders that own no vehicles and transit riders that are African American are disproportionately influenced by extreme heat. The disparity between these two groups and other groups of transit riders becomes wider as climate change continues to exacerbate. The findings of the study highlight an urgent need to implement heat mitigation and adaptation strategies in urban transit networks.

Source: Environmental Research Letters

DOI: 10.1088/1748-9326/adc943

Authors: Huiying Fan, Geyu Lyu, Hongyu Lu, Angshuman Guin, Randall Guensler

Institution: Georgia Institute of Technology

Language: English

Topic: Climate Change and Health Impacts

Subfield: Health, Toxicology and Mutagenesis

Field: Environmental Science

Domain: Physical Sciences

SDGs: Sustainable cities and communities, Good health and well-being, Climate action, Reduced inequalities

Open Access status: gold

Estimated APC paid: $3,045