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Topography and dynamics of real networks' enable network agents to alter their functional behavior. Theoretical and analytical advancements in network science have furthered our understanding of the effects of social network characteristics on peer influence and engagement. Influence of social network occurs when network players alter their decisions and behavior based on others’ influence in the social network which is evident in different disciplines. Crisis communication networks have significant impact during disasters as people often spread pertinent information in social media due to presence of limited access to conventional information sources. Existing researches in social science and sociology indicate that social networks benefit spreading warning message and disseminate information about an imminent risk, nevertheless, the existing studies do not provide enough understanding on how to quantify such influences and how this map into decision-making during emergency evacuations. This study provides a robust review of the studies exploring how individuals are socially influenced, both on-line and off-line, while communicating risk during extreme weather events such as hurricanes. The scope of this review primarily includes studies that look into how our social networks influence the way we decide to evacuate and how crisis information spread from one agent to another agent in a network. The insights and findings obtained through this comprehensive review will be useful to diverse set of stakeholders such as emergency managers, planners, policy makers and practitioners. These include identifying and implementing targeted strategies for different groups of people in similar crisis events based on their social network properties, interactions, and activities.

During the early stages of the Covid-19 pandemic, U.S. environmental organizations and U.S. chapters of international environmental organizations grappled with a broad set of challenges, including when and what to communicate to supporters. In the winter and early spring of 2020, environmental organizations became crisis communicators, confronted by time pressures and the limited attention spans of audiences beset by the pandemic. Crafting communications that are concise and factual, compassionate, that instill confidence, and that evince organizational competence are important facets of crisis communications. However, environmental organizations faced the additional challenge of ensuring that their own priorities were presented clearly and persuasively amidst the flood of pandemic-related information. Responding to the Covid-19 pandemic, and preparation for future pandemics, force environmental organizations to amend their crisis communications to underscore their relevance to crises and their role in problem-solving., Competing Interests: The author declares that he has no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2020 Elsevier Ltd. All rights reserved.)