This article explores the legal obligations of Occupying Powers with regard to climate change adaptation for local populations and their environment under the law of occupation, specifically in the context of prolonged belligerent occupations. It focuses on the critical matter of water and food security, in light of the increasing frequency and severity of extreme weather events. After shedding light on the intricate issues that arise at the intersection of climate change and belligerent occupation, the article argues that the general obligations incumbent upon the Occupying Power under occupation law, when viewed through a climate lens, can be construed as addressing the heightened climate vulnerability faced by occupied populations.