Climate change represents one of the most profound challenges to human security in the twenty-first century. It transcends environmental concerns, threatening the very foundations of social, economic, and political stability. The United Nations Development Programme (UNDP) identifies seven dimensions of human security—economic, food, health, environmental, personal, community, and political—each of which is increasingly vulnerable to the consequences of global climate change. These impacts are particularly severe in developing countries, where limited resources, dependence on climate-sensitive sectors, and inadequate governance structures amplify the risks. Examining how climate change influences each of these dimensions reveals the complex and interconnected nature of human insecurity in a warming world. Economic security, which pertains to stable income and employment, is deeply affected by climate change. Many developing economies depend heavily on climate-sensitive sectors such as agriculture, fisheries, and forestry. Rising temperatures, changing rainfall patterns, and extreme weather events disrupt agricultural productivity, leading to reduced incomes for farmers and rural laborers. For instance, in sub-Saharan Africa and South Asia, droughts and floods have destroyed crops and livestock, pushing millions into poverty. Infrastructure damage caused by cyclones and floods results in economic losses and reduces investment opportunities. Small island developing states, which rely on tourism and coastal industries, face declining revenues as rising sea levels and coral bleaching deter visitors. Informal economies, dominant in many developing nations, are particularly vulnerable because they lack social protection mechanisms. Consequently, climate-induced economic insecurity can trigger migration, social unrest, and increased dependence on international aid, thereby deepening structural poverty. Food security, closely linked to economic and environmental factors, is directly undermined by climate change. The Intergovernmental Panel on Climate Change (IPCC) warns that shifts in temperature and precipitation patterns are altering crop yields and fisheries productivity. Developing countries in tropical and subtropical regions are experiencing declining yields of staple crops such as rice, maize, and wheat. Soil degradation, water scarcity, and pest outbreaks further compromise agricultural sustainability. In parts of Africa and South Asia, prolonged droughts have caused crop failures and famine-like conditions, aggravating malnutrition and hunger. Rising sea levels and saltwater intrusion in delta regions, such as Bangladesh and the Mekong Delta, have rendered fertile lands unproductive. Fisheries, a critical protein source for many coastal communities, are being disrupted as ocean temperatures rise and marine ecosystems deteriorate. The resulting food shortages contribute to higher prices and social tensions, disproportionately affecting women and children, who are often the most food-insecure groups in developing societies. Health security is another domain severely impacted by climate change. Rising global temperatures expand the geographic range of vector-borne diseases such as malaria, dengue, and chikungunya. Flooding and poor sanitation facilitate outbreaks of waterborne diseases like cholera and diarrhea, particularly in densely populated urban slums. Heatwaves cause direct mortality, especially among the elderly and those with pre-existing health conditions. Air pollution linked to climate change exacerbates respiratory illnesses, while food and water scarcity contribute to malnutrition