There is a reality of creeping adverse effects of climate change. The human imprint on it has been affirmed by various global processes including 21 May 2019 recognition by the Anthropocene Working Group. It has emerged as a planetary crisis. By 2050 climate change could see 4% of global annual economic output lost to the tune of $23 trillion and may hit many poorer parts of the world disproportionately. Though entire populations are affected by climate change, women and girls suffer the most. Due to their traditional roles, women are heavily dependent on natural resources. As a consequence of natural disasters and during Covid-19 pandemic in 2020–22, women have faced heightened risks to different forms of sexual and gender-based violence (SGBV). They suffer from a lack of protection, privacy, and mental trauma. Effects of climate change results in the feminization and intensification of vulnerability of women and girls. As there is double victimization of women both as human beings and because of their gender. Growing evidence suggests role of climate change heightened violence against women and girls. There is no specific international legal instrument dealing with SGBV against women during and after the climate change induced disasters. The texts of the three specific climate change treaties (1992 UNFCCC, 1997 Kyoto Protocol and 2015 Paris Agreement) do not address this crucial aspect. It has been given attention only through the recent decisions of the Conference of the Parties (COP). Due to serious psychological and bodily harm SGBV causes to women, it needs to be explicitly factored in respective international legal instruments on climate change and disasters. There are ignorance, denials and lack of adequate attention by scholars and decision-makers in the field to address adverse effects of climate change in causing heightened violence against women and girls. Hence, this study makes a modest effort to deduce and analyze – from scattered initiatives, scholarly literature in different areas, existing international legal instruments and intergovernmental processes – the growing causal relationship between climate change and SGBV especially against women and girls as well as the phenomenal cost so as to suggest a way out for our better common future. It is a new challenge for international law that needs to be duly addressed in a timely manner.