This chapter outlines the holistic aspect of MCDM, its importance, vital elements and applications in the field of hazard observation. This holistic approach to hazard monitoring takes into account the interconnectedness between all the responsible factors, enabling informed decisions to be made. Holistic risk assessment is a radical and exciting shift from traditional approaches which consider single criteria in isolation and are often unable to adequately capture the nuanced interrelationships between different facets of risk and therefore hazards and their consequences. Examples of key elements of the holistic approach to MCDM are integrating different criteria, involving a stakeholder, considering uncertainty and sustainability. Thus, the holistic approach considers multiple perspectives and preferences, includes stakeholders throughout the decision-making process, encompasses uncertainties, and facilitates sustainable solutions that contribute to improve the robustness and reliability of decision outcomes in hazard monitoring. Instances of holistic approach based MCDM applications in hazard monitoring range from disaster management, environmental risk assessment, infrastructure planning and management to policy making. With the incorporation of a holistic perspective, decision-makers can better understand the complex nature of hazards and develop strategies to mitigate risks effectively, ultimately fostering resilience and sustainability in communities exposed to hazards.