HELP US END MASS INCARCERATION The Prison Policy Initiative uses research, advocacy, and organizing to dismantle mass incarceration. We’ve been in this movement for 23 years, thanks to individual donors like you.

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map showing that a two-day heatwave increased deaths in state prisons by 21% in the Northeast, 8.6% in the West, 1.3% in the South, and 0.8% in the Midwest

Data Source: Skarha, J. et al (2023), Heat-related mortality in U.S. state and private prisons: A case-crossover analysis. PLOS ONE 18(3):e0281390. (Map: Leah Wang, 2023)

This map originally appeared in Heat, floods, pests, disease, and death: What climate change means for people in prison.

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