Climate change threatens human health in Southern Africa: Urgent call for climate justice |
Climate change is often framed as an environmental issue, characterized by rising global temperatures, extreme weather events, and the gradual degradation of ecosystems. However, framing it solely in environmental terms obscures its far-reaching implications for human health. In reality, climate change is not just an environmental challenge; it is a critical and systemic threat to human well-being, with the potential to exacerbate existing health inequalities, create new health burdens, and strain already fragile health systems. Nowhere is this more evident than in Southern Africa, a region highly vulnerable to climate-induced health risks despite contributing minimally to global greenhouse gas emissions. Understanding the nexus between climate change and human health in this context is essential to developing effective responses and fostering equitable, resilient societies.
Scientific research increasingly demonstrates that climate change affects the fundamental determinants of health, including clean air, safe drinking water, nutritious food, and secure shelter. These determinants are central to the prevention of disease and the maintenance of overall well-being. When climate change disrupts them, it magnifies health risks across multiple dimensions. Between 2030 and 2050, climate change is projected to cause approximately 250,000 additional deaths annually worldwide due to malnutrition, malaria, diarrhea, and heat stress. Beyond the direct loss of life, these outcomes impose substantial costs on health systems, especially in countries where healthcare infrastructure is limited or already overstretched. Low-income countries and marginalized communities are disproportionately affected, highlighting the inequitable nature of climate-related health risks.
The mechanisms through which climate change affects health are complex and interrelated. Rising global temperatures and increasing frequency of extreme weather events-such as heat waves, floods, and droughts-pose immediate threats to human health by increasing morbidity and mortality directly. Heat waves, for example, can cause heat exhaustion, heat stroke, renal complications, and cardiovascular stress, particularly among outdoor laborers, the elderly, and children. Floods and droughts not only destroy homes and livelihoods but also disrupt........