A detailed description of the methodology is available from the paper below:
Tuholske, C., K. Caylor, C. Funk, A. Verdin, S. Sweeney, K. Grace, P. Peterson, and T. Evans. 2021. Global urban population exposure to extreme heat. Proceedings of the National Academy of Sciences, 118(41), e2024792118. https://doi.org/10.1073/pnas.2024792118.
Please see the readme text file for more information.