In this article we attempt a phenomenological analysis of the climate crisis. We start by arguing that the climate crisis cannot appear as a regular phenomenon. Due to its over-temporality and catastrophic character it is a non-phenomenon. However, we contend, this non-phenomenon announces itself in the hyperphenomenon of heat-waves. We analyse heat as a phenomenon and then show how it becomes a hyperphenomenon in the form of heat-waves. Besides the scientific evidence for prolongued and more extreme heat waves being due to the climate crisis there is a question of how they can be experienced in everyday life as connected to climate change. We argue that, if heat-waves reach extreme temperatures, go on for an unusual long time and are combined with uncommonly high temperatures in winter, we experience, bodily and structurally, a falling apart of our normal order of experience. This experience can motivate an experienced understanding of the climate crisis because it resonates with the overtemporality and catastrophic character of the climate crisis. We therefore understand it as an announcement of the crisis despite its withdrawal.
