This paper investigates the perceptions of professionals (emergency organizations: authorities and first responders) regarding the usage of social media versus the perceptions of the public regarding their expectations concerning the use of social media in communicating emergencies and disasters. It provides a novel perspective on the alignment between perceptions and expectations in disaster social media usage, delving into the structural constraints and opportunities of current practices. The research incorporates qualitative interviews with emergency professionals, a quantitative survey of the general population, and content analysis of social media interactions across seven countries (Israel, Italy, Spain, France, Sweden, Norway, and Romania), aiming to discern differing viewpoints on social media's role in crises. It underscores the variations and commonalities between authorities/first responders and the public's perspectives, revealing differences in acceptance and concerns regarding social media use among these stakeholders. The analysis identified three primary themes: cognitive needs, integrative needs, and communication flow, each with specific, interconnected subthemes. These insights emphasize the need for a better understanding of these diverse perspectives to enhance disaster communication. The paper suggests that effectively utilizing social media and crowdsourcing technologies can help bridge the gap between emergency services and the public, fostering more disaster‐resilient societies.