This may be a good place to start: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5739436/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5739436/ Conclusion: Our

This may be a good place to start: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5739436/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5739436/ Conclusion: Our results indicate excessive mortality among the homeless as well as the weak and rather typical influence of atmospheric conditions on mortality rates in this subpopulation, except for a greater risk of cold related deaths than in the general population... Deaths caused by hypothermia were thirteen-fold more frequently recorded among the homeless than for the general population. A relative risk of death for a homeless person even in moderate cold stress conditions is higher (RR = 1.84) than in thermoneutral conditions.