In early warning and early action (EWEA), the active participation of non-state actors is imperative to the design and dissemination of effective warnings and in ensuring that life-saving preparedness measures are actioned when alerts are issued. Regrettably, there is often a lack of collaboration between state and non-state actors in the development and coordination of early action plans for extreme weather and climate-related events. This document provides an overview of the state and non-state actors involved in building effective, people-centred, inclusive and resilient early warning systems (EWS) at the local, national, and international levels.