Assessing the Impacts of Climate Change on Human Health: A Study of the Climate-Health Nexus in Nampula City, Mozambique

Background: Variations in temperature and precipitation can cause an increase in vector-borne and water-borne diseases. Situated in a vulnerable geographic area, Mozambique is particularly susceptible to such climate-related incidents, leading to floods and the spread of diseases. In this study, we investigated the changes in temperature and precipitation patterns and their impact on the occurrence of vector-borne and water-borne diseases in Nampula, Mozambique. Methods: We used both intra-annual and inter-annual analysis techniques to identify monthly and yearly trends. Linear regression and ANOVA models were applied to assess the relationship between temperature, precipitation, and the selected vector and water-borne diseases (malaria, diarrhea, and dysentery). Results: The analysis of temperature and precipitation data from 2000 to 2019 revealed an overall positive trend and delayed onset and earlier end of the rainy season, implying changes in the timing and duration of rainfall. The analysis of temperature data over the last 10 years revealed an increase in mean minimum temperature. These findings suggest a changing climate pattern characterized by consistent warming trends. Statistically significant results were obtained for the mean minimum temperature from 2010 to 2019 and the mean precipitation from 2000 to 2009 in relation to diarrhea and dysentery, respectively (P   0.05; r = 0.70 and 0.64). Conclusion: This study demonstrates a positive correlation between climate variables and malaria, diarrhea, and dysentery.