Nationwide impact of heat on suicide and homicide in Mexico and Brazil – Nature Mental Health

1. World Health Organization Suicide Worldwide in 2019 (WHO, 2021); https://www.who.int/publications/i/item/9789240026643

2. World Health Organization Health Determinants, Promotion and Prevention (WHO, 2026); https://www.who.int/teams/social-determinants-of-health/violence-prevention

3. Hou, K. et al. High ambient temperatures are associated with urban crime risk in Chicago. Sci. Total Environ. 856, 158846 (2023).

   Article  PubMed  Google Scholar 

4. Stechemesser, A., Levermann, A. & Wenz, L. Temperature impacts on hate speech online: evidence from 4 billion geolocated tweets from the USA. Lancet. Planet. Health 6, e714–e725 (2022).

   Article  PubMed  Google Scholar 

5. Kim, Y. et al. Suicide and ambient temperature: a multi-country multi-city study. Environ. Health Perspect. 127, 117007 (2019).

   Article  PubMed  PubMed Central  Google Scholar 

6. Xu, R., Xiong, X., Abramson, M. J., Li, S. & Guo, Y. Ambient temperature and intentional homicide: a multi-city case-crossover study in the US. Environ. Int. 143, 105992 (2020).

   Article  PubMed  Google Scholar 

7. Rahman, M. M. et al. Ambient temperature and air pollution associations with suicide and homicide mortality in California: a statewide case-crossover study. Sci. Total Environ. 874, 162462 (2023).

   Article  PubMed  PubMed Central  Google Scholar 

8. Burke, M. et al. Higher temperatures increase suicide rates in the United States and Mexico. Nat. Clim. Chang. 8, 723–729 (2018).

   Article  Google Scholar 

9. Fernández-Arteaga, V. et al. Association between completed suicide and environmental temperature in a Mexican population, using the Knowledge Discovery in Database approach. Comput. Methods Programs Biomed. 135, 219–224 (2016).

   Article  PubMed  Google Scholar 

10. Nicolini, H. et al. Gender differences in suicide and homicide rates in Mexico City during 2019. Int. J. Environ. Res. Public Health 19, 8840 (2022).

    Article  PubMed  PubMed Central  Google Scholar 

11. World Health Organization Suicide (WHO, 2025); https://www.who.int/news-room/fact-sheets/detail/suicide

12. United Nations Office on Drugs and Crime Global Study on Homicide 2023 (United Nations, 2023).

13. Naghavi, M. et al. Global burden of 288 causes of death and life expectancy decomposition in 204 countries and territories and 811 subnational locations, 1990–2021: a systematic analysis for the Global Burden of Disease Study 2021. The Lancet 403, 2100–2132 (2024).

    Article  Google Scholar 

14. Cornelius, S. L., Berry, T., Goodrich, A. J., Shiner, B. & Riblet, N. B. The effect of meteorological, pollution, and geographic exposures on death by suicide: a scoping review. Int. J. Environ. Res. Public Health https://doi.org/10.3390/ijerph18157809 (2021).

15. Heo, S., Lee, W. & Bell, M. L. Suicide and associations with air pollution and ambient temperature: a systematic review and meta-analysis. Int. J. Environ. Res. Public Health https://doi.org/10.3390/ijerph18147699 (2021).

16. Frangione, B. et al. Short-term changes in meteorological conditions and suicide: a systematic review and meta-analysis. Environ. Res. 207, 112230 (2022).

    Article  PubMed  Google Scholar 

17. Bar, S., Bundo, M., de Schrijver, E., Muller, T. J. & Vicedo-Cabrera, A. M. Suicides and ambient temperature in Switzerland: a nationwide time-series analysis. Swiss Med. Wkly 152, w30115 (2022).

    Article  PubMed  Google Scholar 

18. Iniguez-Montiel, A. J. & Kurosaki, T. Growth, inequality and poverty dynamics in Mexico. Lat. Am. Econ. Rev. 27, 12 (2018).

    Article  Google Scholar 

19. Farias, E. & Teixeira, E. Income inequality and economic growth: an analysis for Brazil and its geographic regions. Gestão Regionalidade 38, 181–196 (2022).

    Google Scholar 

20. Coube, M., Nikoloski, Z., Mrejen, M. & Mossialos, E. Persistent inequalities in health care services utilisation in Brazil (1998–2019). Int. J. Equity Health 22, 25 (2023).

    Article  PubMed  PubMed Central  Google Scholar 

21. Choi, H. M. et al. Temperature, crime, and violence: a systematic review and meta-analysis. Environ. Health Perspect. 132, 106001 (2024).

    Article  PubMed  PubMed Central  Google Scholar 

22. Mahendran, R. et al. Ambient temperature and deaths from homicide in Brazil from 2010–2019: a nationwide space-time–stratified case-crossover study. Am. J. Epidemiol. https://doi.org/10.1093/aje/kwae473 (2024).

23. Fau, L. F. et al. Association of daily temperature with suicide mortality: a comparison with other causes of death and characterization of possible attenuation across 5 decades. Am. J. Epidemiol. 191, 2037–2045 (2022).

    Article  Google Scholar 

24. Bissell, K. E. & Cecala, K. K. Increased interspecific aggression between Appalachian stream salamanders at elevated temperatures. Freshw. Sci. 38, 834–841 (2019).

    Article  Google Scholar 

25. Van Lange, P. A. M., Rinderu, M. I. & Bushman, B. J. Aggression and violence around the world: a model of CLimate, Aggression, and Self-control in Humans (CLASH). Behav. Brain Sci. 40, e75 (2017).

    Article  PubMed  Google Scholar 

26. Palacio-Mejía, L. S. et al. Leading causes of excess mortality in Mexico during the COVID-19 pandemic 2020–2021: a death certificates study in a middle-income country. Lancet Reg. Health Am. 13, 100292 (2022).

    Google Scholar 

27. Harris, M. in Race, Ethnicity, Crime and Criminal Justice in the Americas (ed. Kalunta-Crumpton, A.) 112–132 (Springer, 2012).

28. Christodoulou, C. et al. Suicide and seasonality. Acta Psychiatr. Scand. 125, 127–146 (2012).

    Article  PubMed  Google Scholar 

29. Cohen, F. & Gonzalez, F. Understanding the link between temperature and crime. Am. Econ. J. Econ. Policy 16, 480–514 (2024).

    Article  Google Scholar 

30. Kim, Y. et al. Suicide and ambient temperature in east asian countries: a time-stratified case-crossover analysis. Environ. Health Perspect. 124, 75–80 (2016).

    Article  PubMed  Google Scholar 

31. Meteorological Conversions and Calculations (NOAA/National Weather Service (NWS)/National Centers for Environmental Prediction (NCEP)–Weather Prediction Center (WPC), 2022); https://www.wpc.ncep.noaa.gov/html/calc.shtml

32. Janes, H., Sheppard, L. & Lumley, T. Case-crossover analyses of air pollution exposure data: referent selection strategies and their implications for bias. Epidemiology 16, 717–726 (2005).

    Article  PubMed  Google Scholar 

33. National Oceanic and Atmospheric Administration Infographic: Meteorological and Astronomical Seasons (NOAA, 2024); https://www.noaa.gov/education/multimedia/infographic/infographic-meteorological-and-astronomical-seasons

34. Mann, J. J., Michel, C. A. & Auerbach, R. P. Improving suicide prevention through evidence-based strategies: a systematic review. Am. J. Psychiatry 178, 611–624 (2021).

    Article  PubMed  PubMed Central  Google Scholar 

35. Climate Change: World Energy Outlook Special Briefing for COP21 (Paris: International Energy Agency, 2015).

36. Stewart-Ruano, A. A.-O. et al. A critical gap in addressing mental health in heat-health action plans worldwide. Curr. Environ. Health Rep. 12, 23 (2025).

    Article  PubMed  PubMed Central  Google Scholar 

37. Solar, C. & Pérez Ricart, C. A. (eds) Crime, Violence, and Justice in Latin America (Routledge (Taylor & Francis Group), 2022); https://doi.org/10.4324/9781003265672

38. Costa, L. F. L. et al. Estimating completeness of national and subnational death reporting in Brazil: application of record linkage methods. Popul. Health Metr. 18, 22 (2020).

    Article  PubMed  PubMed Central  Google Scholar 

39. Kephart, J. L. et al. City-level impact of extreme temperatures and mortality in Latin America. Nat. Med. 28, 1700–1705 (2022).

    Article  PubMed  PubMed Central  Google Scholar 

40. Yang, J. et al. Projecting heat-related excess mortality under climate change scenarios in China. Nat. Commun. 12, 1039 (2021).

    Article  PubMed  PubMed Central  Google Scholar 

41. Smits, J. & Permanyer, I. The subnational human development database. Sci. Data 6, 190038 (2019).

    Article  PubMed  PubMed Central  Google Scholar 

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