Human activity has had severe effects on the changes in climate over the last decades affecting, as a consequence, human security overall. The importance of changes in climate and their consequent effects have been long overlooked to the point that nowadays human health is being threatened by sea rise, extreme weather events, lack of adequate basic resources, and the spread of numerous diseases, to name some. This article aims to demonstrate how these variations have promoted the spread of vector-borne diseases (VBD). More specifically, it follows the developments of Dengue fever (DENV) as a result of higher temperatures and abundant precipitations, with a particular focus on the effects of humidity and a warm environment on the proliferation of VBD. To provide evidence of these climate consequences, two empirical cases are analysed and explained, one in Bangladesh and another in Ecuador. Overall, the analysis shows a positive correlation between the increase in temperatures and the changes in the weather and the proliferation of DENV in the above-mentioned territories. This article concludes that the increased temperatures, together with the evolution of extreme weather events have facilitated the reproduction of mosquitoes carrying DENV, and have enlarged the geographic and temporal distribution in which they inhabit. On this basis, the importance of climate change and its effects on human health should be tagged as a primary concern when facing challenges over human security.

Keywords: Bangladesh; Climate Change; Dengue Virus; Ecuador; Human Security; Vector-borne Diseases