To cite package ‘heatindex’ in publications use:

  Lu Y, Romps D (2025). _heatindex: Calculating Heat Stress_. R package
  version 0.0.2, <https://CRAN.R-project.org/package=heatindex>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {heatindex: Calculating Heat Stress},
    author = {Yi-Chuan Lu and David M. Romps},
    year = {2025},
    note = {R package version 0.0.2},
    url = {https://CRAN.R-project.org/package=heatindex},
  }