The rapid deterioration of the climate, marked by record-breaking temperatures and increasingly frequent extreme weather events, rarely registers as sufficiently exceptional for truly meaningful global action. This is often due to cognitive biases and the uneven distribution of climate global impacts, leading to widespread underestimation and inadequate preparedness. This chapter sets the stage for the remainder of the book by introducing the climatisation framework, a conceptual approach for analysing how police organisations respond to, adapt to, and integrate emerging climate policies. This framework offers a neutral alternative to prevailing narratives of securitisation or riskification that tend to dominate discussions about the interrelationship between climate change and law enforcement (as a security actor). Climatisation within policing manifests across multiple levels to varying degrees, depending on local contexts. It often occurs in response to specific shocks and stressors, with a delayed onset, without explicit recognition, and with an uneven distribution of harm. Consequently, the police will be increasingly required to respond through so-called climatising efforts that can be categorised as symbolic, strategic, precautionary, and transformative. Excluding police from critical policy dialogues, which are still predominantly dominated by security experts, risks confining their role to merely symbolic gestures. This marginalisation could exacerbate existing and unavoidable trade-offs and hinder the development of meaningful, equitable responses to climate-related challenges.