Risk Communications/Emergency Public Information and Warning
Topic Collection
February 13, 2025
Topic Collection: Risk Communications/Emergency Public Information and Warning
Effective communication is a key component of successful disaster management. Communication includes providing the public with information through verbal, written, or visual means. Clear, concise messages provided by trusted leaders before, during, and after an incident can help residents feel informed and empowered and facilitates actions that help ensure their personal safety and that of the community. The consistency of these messages is critical as misinformation (the spread of erroneous information), disinformation (the purposeful creation and proliferation of false/misleading information), and malinformation (based on fact, but used out of context to mislead or cause harm) proliferate online (Cybersecurity & Infrastructure Security Agency, 2022). Most recently, the word “infodemic” has been used to refer to the dissemination of too much information, especially misleading information, during an infectious disease outbreak (e.g., World Health Organization, 2023).
As healthcare organizations and public health authorities now use social media to communicate with the public, particularly during natural disasters, mass violence incidents, and the COVID-19 pandemic, we encourage users to access our Social Media in Emergency Response for more information.
Resources in this Topic Collection include lessons learned; education and training modules; results from studies conducted on the effectiveness of risk communications; and plans, tools, and templates that can be tailored to meet the specific threats and needs of healthcare and medical professionals.
Each resource in this Topic Collection is placed into one or more of the following categories (click on the category name to be taken directly to that set of resources). Resources marked with an asterisk (*) appear in more than one category.
Must Reads
This article reviews the scope of the COVID-19 “infodemic,” which, amid social media misinformation and a lack of credible sources and strategies for disseminating health information, challenged health authorities responsible for disseminating COVID-19 vaccines. The authors call for partnership between scientists, public health agencies, government, and social media companies to combat misinformation.
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This article discusses the rapid spread of mis- and disinformation about the COVID-19 pandemic on social media, part of an “infodemic” of available information. The authors describe the “Dear Pandemic” social media project, an innovative and multidisciplinary effort to disseminate trusted scientific information and enable media literacy around social media content.
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Speakers representing a wide range of stakeholders and jurisdiction types (national, large/urban, regional, and rural/tribal) shared their perspectives on how they integrated lessons learned during recent incidents into current and future responses. Topics included channels used for outreach and continued engagement, strategies for reaching different community and cultural groups, tracking and countering rumors, and working with partners to create complementary messaging.
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This website hosts the Centers for Disease Control and Prevention's crisis and emergency risk communication training modules, resources, shared learning materials (e.g., case studies), and social media links.
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This evidence-based tool can help healthcare emergency communications staff create and assess communication products on a variety of topics for diverse audiences. Users are prompted to provide information about seven key communications areas (e.g., main message, behavioral recommendations) and the Index provides an overall score. Links to message development resources are also provided on this webpage.
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This website provides links to resources geared towards disaster preparedness in culturally diverse communities. Materials are grouped into six main categories: Community, Type of Emergency, Resource Type, Language, U.S. Region, and those that fall under Multiple Categories.
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The authors conducted a literature review of 127 articles and focused on five research questions specific to the effect of select variables on evacuation and shelter-in-place decisions. The conclusion includes key recommendations and suggestions for additional research.
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This easy-to-use, online toolkit helps public health and healthcare entities plan for and implement text messaging programs for use in emergencies and for more general health promotion. It covers topics such as why text messaging is effective, how to get people to subscribe, legal issues, and technological options.
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This website contains information for businesses on developing a crisis communications plan. It recommends identifying the target audience, including customers, disaster survivors, employees, the news media, government officials, among other community members the business serves. It describes how to craft an appropriate message, obtaining contact information, and further resources which may be of use.
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This guide can help health officials (and others responsible for communicating to the public before, during, and after a crisis) prepare their messaging to ensure it is actionable and received effectively by the public.
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This article describes the role of risk communications between local authorities, healthcare providers, and residents in supporting the return of residents of Kawauchi Village, Fukushima Prefecture to their hometown in 2017 after the 2011 accident at the Fukushima Daiichi Nuclear Power Station.
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This website provides practical guidance for developing a robust emergency communications plan. Steps include coordinating response across multiple media outlets, incorporating trusted messengers, improving outreach to vulnerable populations, normalizing unknowns inherent in the scientific process, rapidly addressing mis- and disinformation, incorporating empathy, and empowering community members. Finally, it contains recommended readings and relevant sources.
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The authors used a rapid needs assessment to gather information on Americans’ preferred channels of information in an emergency. The study found that 75.0% of households used television as their primary information source; primary preference for social media ranged from 3.2%-41.8%, and 8.3%-10.4% of participants reported word of mouth was their main method of obtaining information. The study emphasizes the importance of multi-channel risk communication during emergencies.
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Education and Training
Center for Health Security. (2024).
TRUST Video Series.
Johns Hopkins Bloomberg School of Public Health.
This video series provides a curriculum for healthcare and public health professionals to build trust during a public health emergency and in an environment of misinformation. The videos introduce the TRUST in public health website, provide information on tackling rumors, and cover the 4 I Fact Model developed by the Center for Health Security.
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This website hosts the Centers for Disease Control and Prevention's crisis and emergency risk communication training modules, resources, shared learning materials (e.g., case studies), and social media links.
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This free toolkit and training can help medical communicators learn how to use plain language and improve the readability of their messages. These resources are useful for healthcare and public health staff who need to translate data and other technical information for general audiences.
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This 2.5 hour, interactive course teaches health communicators about the following topics: reactions the public might have during a public health emergency, effective communication strategies, how to communicate with the media, how to work with the community, and the importance of developing communication plans before an incident occurs.
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This resource outlines considerations for healthcare providers and others interested in learning more about health misinformation. It explains the concept, contains interactive questions on misinformation scenarios, and provides information on common disinformation tactics, and questions to ask before sharing information with colleagues, patients, and others.
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In this foundational risk communications article, the author examines and explains public perception of risk for various activities and technologies (e.g., nuclear power, handguns, smoking, and vaccination) and accidents and hazards. Findings indicate that while risk is quantifiable, communicating it is an intricate process that, according to the author must be “structured as a two-way process.”
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This YouTube channel contains risk communication resources for communities speaking Hmong, Somali, Spanish, and English. ECHO Minnesota aims to connect immigrant communities with emergency preparedness, health, safety, and civic engagement information.
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The speakers in this 1-hour webinar emphasize the importance of engaging the Latino community in preparedness and the need for disaster responder cultural awareness including suggestions for risk communication. While slightly dated, it can help planners reach immigrant and other culturally diverse communities. The webinar emphasizes core cultural values, coping strategies, unique risk factors, and usual sources of support and inspiration that can be valuable when planning communications and adapting them to themes that will resonate. Trust issues and ability to comply with directives relative to immigration status are also discussed. Access the related report here: https://unidosus.org/wp-content/uploads/2021/07/EmergencePreparednessTK_Print.pdf
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Evaluation
This article describes a study conducted in Israel to understand how the public would seek healthcare in the aftermath of a non-conventional terrorism event. When study participants were exposed to risk communication about these events, they reported being more likely to seek medical care. The findings emphasize the importance of risk communication on the public’s behaviors after terrorism or other emergencies.
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The authors conducted a literature review of 127 articles and focused on five research questions specific to the effect of select variables on evacuation and shelter-in-place decisions. The conclusion includes key recommendations and suggestions for additional research.
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The authors conducted surveys and semi-structured interviews with caregivers of youth with special healthcare needs to understand how they would respond to an infectious disease outbreak. The authors found that 84% of caregivers believed their child’s doctor is the best information source, followed by medical experts, the CDC, friends, family, and local and state health agencies.
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The authors reviewed 13 articles to identify 10 themes associated with public trust in crisis communications. They found that public trust depends on consistency, repetition, timeliness, transparency, and uncertainty. Other factors included using a health official as spokesperson and ensuring the presentation is not politicized. The authors found community leaders and family doctors were also trusted messengers.
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This study examines content shared during Hurricane Harvey by a Houston emergency management account on Twitter, with a focus on the number of retweets, linguistic considerations, and the emergence of opinion leaders. The findings are compared with other disasters and can be considered for risk communication in future emergencies.
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This article outlines a conceptual model for disaster communications based on risk communication literature, interviews, and discussions with stakeholders. The model facilitates assessment of internal processes and deficiencies to improve outcomes.
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The authors surveyed 757 people who were representative of British Columbia’s demographics to understand prevention of wildfire smoke-related risks. The authors found that respondents receive information on wildfire smoke from websites, social media, radio, and television. They recommend environmental and public health officials tailor messages to at-risk groups such as Indigenous populations and those with lower educational attainment.
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The authors used a rapid needs assessment to gather information on Americans’ preferred channels of information in an emergency. The study found that 75.0% of households used television as their primary information source; primary preference for social media ranged from 3.2%-41.8%, and 8.3%-10.4% of participants reported word of mouth was their main method of obtaining information. The study emphasizes the importance of multi-channel risk communication during emergencies.
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Lessons Learned: COVID-19
This article discusses the rapid spread of mis- and disinformation about the COVID-19 pandemic on social media, part of an “infodemic” of available information. The authors describe the “Dear Pandemic” social media project, an innovative and multidisciplinary effort to disseminate trusted scientific information and enable media literacy around social media content.
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Speakers representing a wide range of stakeholders and jurisdiction types (national, large/urban, regional, and rural/tribal) shared their perspectives on how they integrated lessons learned during recent incidents into current and future responses. Topics included channels used for outreach and continued engagement, strategies for reaching different community and cultural groups, tracking and countering rumors, and working with partners to create complementary messaging.
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The authors surveyed 1,800 adults to determine their primary sources of COVID-19 information. Older adults listed print materials and television; respondents with less education and greater self confidence/efficacy preferred interpersonal sources; and those who reported experiencing discrimination relied on friends, relative, and coworkers for information. The authors list guidelines for developing future pandemic communication campaigns.
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This article identifies risks associated with excess information and lack of information, classifying information environments as inadequate, ideal, and “infodemic.” The authors describe how risk communications can create risks when managing a disaster and how appropriate risk communication can encourage resilience during disasters and crises.
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The authors examined the most viewed videos on YouTube about COVID-19 vaccines to understand whether the platform conveyed accurate information. They found that 11% of the most viewed videos about COVID-19 contradicted information from WHO or the CDC.
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The authors examined how participants perceived efforts to convey risk during the COVID-19 pandemic. Results showed that increased negative affect, assertiveness, and communication of risk caused participants to take action. The authors also found that signal words could be improved to communicate risk and inspire action more effectively.
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Lessons Learned: General
This webpage (created during the 2014 Ebola outbreak) is geared towards medical risk communicators and emphasizes that fear and other emotions can interfere with community members' judgment and behavior, particularly during an Ebola outbreak. This makes it extremely important to evaluate and test messages before releasing them to the public, and tailor messages to various audiences (e.g., young people, limited or non-English speakers, the elderly).
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The authors of this study interviewed state emergency management leaders in South Carolina about their social media strategy during a flood in 2015. The article discusses social media policies, practices, strategies, and models, as well as media relations and communication with the public. Finally, the authors offer recommendations to improve social media communications during future disasters.
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This study examines content shared during Hurricane Harvey by a Houston emergency management account on Twitter, with a focus on the number of retweets, linguistic considerations, and the emergence of opinion leaders. The findings are compared with other disasters and can be considered for risk communication in future emergencies.
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The authors reviewed 33 peer-reviewed studies that assessed communication strategies or information needs using hypothetical CBRN scenarios or in actual CBRN incidents to identify in advance what people would want to know, where they would get information from, and how messages should be presented. These strategies are critical for ensuring that affected individuals get to the right place at the right time to receive assessment and interventions.
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This evidence-based toolkit was developed in collaboration with the NORC Walsh Center for Rural Health Analysis. It provides practical guidance for planning for, responding to, and recovering from disasters and emergencies in rural communities. It also includes guidance and resources for different types of emergencies and considerations for special populations.
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The authors provide a history of USGS communication about volcanoes and eruptions since the Hawaiian Volcano Observatory was established in 1912 through current times, where information is primarily shared via social media. They found that social media updates during the Kilauea eruption were amplified by news media and helped take the pressure off scientists who would otherwise need to respond to media requests. The authors share successes and challenges from the event and make recommendations for the future.
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This article describes the role of risk communications between local authorities, healthcare providers, and residents in supporting the return of residents of Kawauchi Village, Fukushima Prefecture to their hometown in 2017 after the 2011 accident at the Fukushima Daiichi Nuclear Power Station.
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This book provides a summary of conference proceedings where risk communications experts discussed the public response to mobile alerts. A free PDF download is available or physical copies can be ordered for a fee.
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The authors reviewed the gray literature (articles disseminated outside of commercial publishers) regarding outbreaks of Ebola, Zika, and yellow fever from 2015-2016. The literature emphasized the importance of involving local communities in risk communication ahead of an emergency. They indicate that social media is useful but should be considered supplemental to traditional risk communication.
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This article examines the August 2018 government and mainstream media communications about the risks of wildfire smoke in Washington. The authors performed a content analysis and found room for improvement in informing the public about what to do, targeting vulnerable groups, and emphasizing reliable sources of information.
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Plans, Tools and Templates: Ebola and Flu
This factsheet shares Ebola-specific risk communication information and emphasizes that the disease can be accompanied by public fear and misinformation, making clear communication even more important. The site includes information about transmission, stigma (and countering stigmatization), and provides quick tips for communicators (e.g., be empathetic, provide positive action steps).
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The authors worked with risk communication consultants and state health officials to develop messaging written at a 6th to 8th grade reading level. Questions are divided into the following categories: basic, preparedness, medicines and vaccines, healthcare response, quarantine and isolation, monitoring and contact tracing, mental health, travel and transport, and media.
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This toolkit can help local health authorities develop public messaging before and during the influenza season. It includes background information, links to key resources, talking points, sample press releases, printable materials, and sample social media messages for Twitter and Facebook.
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This document can help health communication staff learn about the key concepts of risk communication, how to share information about the first case of imported Ebola, and communications goals. It also includes templates that can be downloaded and customized.
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The guidance in this document can help health risk communicators create and activate a national Ebola risk communication plan. The steps can also be customized for more local initiatives.
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This document can help health communication staff design public announcements of a potential first case of Ebola in their country. The information can also be customized to suit local initiatives.
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The guidance in this document is geared towards helping healthcare agencies increase the number of healthcare professionals who get vaccinated against flu. The authors summarize research, identify existing gaps, describe different segments in the healthcare profession, and suggest strategies for communicating with healthcare providers and patients.
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These messages were developed during the 2014 Ebola outbreak for risk communicators to share with community residents. The messages can be tailored to other hazards, and focus on risk minimization and tips for caring for/supporting relatives and community members.
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Plans, Tools and Templates: General
This article can help healthcare emergency planners learn more about using plain language alerts and the importance of multimodal notifications for staff during a disaster. With free registration, users can access mass communication templates for different types of disasters.
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This ASPR TRACIE tip sheet (which is part of a series) can help healthcare system planners incorporate issues related to security, volunteers, media affairs, and donations into their no-notice incident plans.
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This collection provides public service announcements to help communicators respond to a wide variety of public health emergencies, including earthquakes, floods, hurricanes, wildfires and more. Topics also include messaging around common all-hazards topics, such as the needs of at-risk populations, safe cleanup, and safe use of medication after a disaster. The PSAs are available in a variety of formats, including text message, short scripts for broadcast use, short videos for use on social media and more.
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This evidence-based tool can help healthcare emergency communications staff create and assess communication products on a variety of topics for diverse audiences. Users are prompted to provide information about seven key communications areas (e.g., main message, behavioral recommendations) and the Index provides an overall score. Links to message development resources are also provided on this webpage.
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This free toolkit and training can help medical communicators learn how to use plain language and improve the readability of their messages. These resources are useful for healthcare and public health staff who need to translate data and other technical information for general audiences.
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Health Communication Research Laboratory. (2024).
iHeard Asset.
Washington University in St. Louis.
This toolkit provides sample social media posts for public health-related topics such as measles outbreaks/vaccine, respiratory illnesses, a listeria outbreak, and a national blood shortage. Images and hashtags accompany each post and can be used by health care communicators to bolster their messages.
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This plan describes how the state health department handles communications during a disaster or public health emergency. The plan describes decision structures, leadership for coordinating emergency communications, and collaborations with other agencies and levels of government. The document is a framework for internal communications and external messaging.
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This playbook provides guidance for public health practitioners seeking to counter misinformation, disinformation, and misleading rumors. It also includes recommendations for reinforcing trust in public health such as holding a team to call on when a rumor comes up, building partnerships with community members to establish trusted messengers and networks, knowing your audience, identifying misinformation, and quickly addressing questions and concerns. It provides tools, templates, and examples health care communicators can use to facilitate successful communications.
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This playbook provides practical guidance for public health and healthcare providers who are countering misinformation and building trust in their communities. The playbook includes templates, checklists, and tools to support effective communications.
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The guide lays out best practices for cultural inclusion when designing crisis communications. It includes information on understanding the demographics of the area being served, engaging community members, and setting a respectful and open tone to encourage understanding.
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This checklist can help foster effective communication by hospitals and public health departments during public health emergencies. It includes five priorities, including internal operations, connections with the community, developing relationships with trusted messengers, anticipating misinformation, and creating effective messages.
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This easy-to-use, online toolkit helps public health and healthcare entities plan for and implement text messaging programs for use in emergencies and for more general health promotion. It covers topics such as why text messaging is effective, how to get people to subscribe, legal issues, and technological options.
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This website contains information for businesses on developing a crisis communications plan. It recommends identifying the target audience, including customers, disaster survivors, employees, the news media, government officials, among other community members the business serves. It describes how to craft an appropriate message, obtaining contact information, and further resources which may be of use.
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This guide can help health officials (and others responsible for communicating to the public before, during, and after a crisis) prepare their messaging to ensure it is actionable and received effectively by the public.
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This website provides practical guidance for developing a robust emergency communications plan. Steps include coordinating response across multiple media outlets, incorporating trusted messengers, improving outreach to vulnerable populations, normalizing unknowns inherent in the scientific process, rapidly addressing mis- and disinformation, incorporating empathy, and empowering community members. Finally, it contains recommended readings and relevant sources.
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This website contains links to one-page fact sheets for the general public on infectious diseases, chemical and biological agents, radiation, severe weather, natural disasters, and emergency preparedness and response. Each resource is available in seven languages; some are available in large type.
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Plans, Tools and Templates: Natural Disasters
This article discusses how risk communication can change flood risk perception. The authors evaluated public perception of flood risk by surveying 420 households in Pakistan to identify the social determinants of risk perception. They found that people living away from the river perceived stronger risk, and there was a strong correlation between perception of risk and receipt of (and seeking out) risk communication. The findings may inform risk communications efforts in the U.S.
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This toolkit can help health communicators tasked with developing or updating heat-related health communication strategies. It features strategies for reaching specific audiences, including the public, healthcare professionals, and rural populations as well as "coaching" on what messages to emphasize at what times prior to and during a heat event.
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The National Weather Service provides links to sources that provide tsunami event messages.
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This toolkit can help local health authorities develop public messaging during a severe wildfire smoke event. It includes key messages, talking points, sample press releases, sample social media messages for Twitter and Facebook, and links to related information.
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This article examines the August 2018 government and mainstream media communications about the risks of wildfire smoke in Washington. The authors performed a content analysis and found room for improvement in informing the public about what to do, targeting vulnerable groups, and emphasizing reliable sources of information.
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Populations with Access and Functional Needs
This article describes focus groups conducted with people experiencing homelessness in four cities to understand how COVID-19 messaging was targeted and received by this population. Findings indicated that using trusted messengers and multiple sources was important. People experiencing homelessness preferred face-to-face communication, but they also received news through the media, internet, and social media.
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This resource discusses communication planning for individuals with access and functional needs, as well as guidance for integrating community partners into communication strategies. It replaces CDC’s Public Health Workbook: To Define, Locate, and Reach Special, Vulnerable, and At-Risk Populations in an Emergency published in 2010.
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This issue brief outlines strategies to integrate the needs of people experiencing homelessness into broader emergency preparedness efforts. It examines individuals experiencing homelessness' and service providers' awareness and perception of targeted preparedness efforts, and offers recommendations for other communities looking to improve disaster assistance for people experiencing homelessness.
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This website synthesizes what is known about communication with at-risk populations from a multi-year partnership between the Natural Hazards Center research team and the U.S. Army Corps of Engineers Institute for Water Resources. It includes an annotated bibliography on communication with at-risk populations, a guide for practitioners, and a worksheet booklet which may facilitate communication with these populations.
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This resource emphasizes the importance of identifying cultural and linguistic groups to be reached, building relationships with stakeholders, and listening to and involving the community in decision-making when developing and providing equitable disaster response and recovery services.
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Many health and emergency management practitioners plan and implement emergency and disaster preparedness activities that entail working with grassroots organizations serving low-income populations. This guide contains strategies that can help stakeholders more successfully deliver health-specific messages to those populations.
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This website contains information for rural health agencies planning for crisis communications in a disaster, including identifying disasters possible in a community, populations which may be at risk for adverse events, alert and notification procedures, and activation criteria. Recommendations include interpreting social media messages into languages spoken in the community, keeping digital accessibility in mind when messaging, using multimodal communication, and pretesting messages to ensure they are appropriate. The website also contains case studies.
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The guidance in this document is geared towards helping healthcare agencies increase the number of members of at-risk groups who get vaccinated against flu. The authors identify the at-risk groups, summarize traditional communication issues, and provide strategies for developing immunization messages. The emphasis is on communications for an influenza pandemic, although the principles can be adapted to other contexts.
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The speakers in this 1-hour webinar emphasize the importance of engaging the Latino community in preparedness and the need for disaster responder cultural awareness including suggestions for risk communication. While slightly dated, it can help planners reach immigrant and other culturally diverse communities. The webinar emphasizes core cultural values, coping strategies, unique risk factors, and usual sources of support and inspiration that can be valuable when planning communications and adapting them to themes that will resonate. Trust issues and ability to comply with directives relative to immigration status are also discussed. Access the related report here: https://unidosus.org/wp-content/uploads/2021/07/EmergencePreparednessTK_Print.pdf
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Agencies and Organizations
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Substance Abuse and Mental Health Services Administration.
Communications.
U.S. Department of Health and Human Services.
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