Impact of the tsunami caused by the Hunga Tonga-Hunga Ha'apai eruption in Costa Rica on 15 January 2022

Hunga Tonga-Hunga Ha'apai had a large eruption (VEI 5-6) on 15 January 2022, which caused a tsunami recorded in all ocean basins. Costa Rica has made many advances in tsunami preparation over the past 9 years since the creation of SINAMOT (Sistema Nacional de Monitoreo de Tsunamis, National Tsunami Monitoring System), both on watch and warning protocols and on community preparedness. For the Hunga Tonga-Hunga Ha'apai event, the government declared a low-threat warning, suspending all in-water activities, even though the country did not receive any official warning from PTWC (Pacific Tsunami Warning Center) due to the lack of procedures for tsunamis generated by volcanoes. The tsunami was observed at 24 locations on both the Pacific and Caribbean coasts of Costa Rica, becoming the second most recorded tsunami in the country, after the 1991 Limon tsunami along the Caribbean coast. At 22 of those locations along the continental Pacific coast, observations were made by eyewitnesses, including one collocated with the sea level station at Quepos, which registered the tsunami. At Cocos Island (~ 500 km southwest of the continental Costa Rica, in the Pacific Ocean), several eyewitnesses reported the tsunami at two locations, and it was recorded at the sea level station. The tsunami was also recorded at the sea level station on the Caribbean coast. The tsunami effects reported were a combination of sea level fluctuations, strong currents, and coastal erosion, proving that the response actions were adequate for the size of the tsunami. Tsunami preparedness and the largest waves arriving during a dry season Saturday afternoon allowed the large number of eyewitness reports. This event then increased tsunami awareness in the country and tested protocols and procedures. Still, many people along the coast were not informed of the tsunami during the alert due to their remote location, the short notice of the warning, and a lack of procedures for some communities. There is thus still much work to do, particularly about warning dissemination, a direction in which communities should take an active role.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00445-023-01648-x.

Supporting pandemic disease preparedness: Development of a composite index of area vulnerability

Although pandemics are rare, planning and preparation for responding to them plays a crucial role in preventing their spread. The management and control of pandemics such as COVID-19 relies heavily on a country's health capacity. Measuring vulnerability to pandemics in geographical areas could potentially delay a pandemic's exponential growth and reduce the number of cases, which would alleviate the disease impact on communities and the health care sector. The aim of this study is to generate an area-level COVID-19 Pandemic Vulnerability Index (CPVI) and to assess its correlation with COVID-19 cases. Data were collected for Local Government Areas (LGAs) across Australia from different sources including Australia Bureau of Statistics, Australian Institute of Health and Welfare, and General Transit Feed Specification. Based on recent official reports about the COVID-19 outbreak, 18 factors were identified as influencing vulnerability to the disease within LGAs. Using factor analysis, four latent factors were identified and named as sociodemographic, medical conditions, transportation, and land use. Predicted factor scores were summed to generate a CPVI for each LGA. The CPVI was evaluated by correlating with confirmed cases of COVID-19 standardised by adult population in New South Wales and Victoria, the two Australian states with the highest numbers of confirmed cases. There was a statistically significant correlation between the CPVI and COVID-19 in New South Wales (r = 0.49) and Victoria (r = 0.48). LGAs scoring higher on the CPVI also had a higher absolute number of cases. The CPVI could be used by policymakers to identify at-risk areas and to develop preparedness and response plans to help mitigate the spread of COVID-19 and future pandemics.

Returning to normalcy in the short term: a preliminary examination of recovery from Hurricane Harvey among individuals with home damage

This study focuses on coastal counties in Texas, United States, affected by Hurricane Harvey in 2017 to gauge the influence of individual and contextual characteristics on people's ability to return to normalcy in the short term. Data from a survey conducted by the Kaiser Family Foundation and the Episcopal Health Foundation between October and November 2017 were utilised in the analysis. The paper observes, based on the results of an ordered logistic regression, and contrary to previous work, that age, gender, levels of poverty, and social capital are not significant predictors of a return to normalcy. However, indicators such as whether a person evacuated, if he/she identified as Hispanic/Latino, the extent of damage sustained to one's home, and if one's automobile was damaged or destroyed are shown to affect recovery. A discussion of the potential reasons for these findings is provided as a means of informing future research on disaster recovery.

Disaster Communication, Posttraumatic Stress, and Posttraumatic Growth following Hurricane Matthew

Disaster survivors may experience a range of mental health reactions that can include posttraumatic stress (PTS) and posttraumatic growth (PTG). The current study examines the associations between citizen disaster communication, PTS, and PTG among individuals in North Carolina communities impacted by Hurricane Matthew, approximately six weeks following the event. Participants who communicated more frequently following the hurricane exhibited more PTS and PTG. Communication activities focused on connecting with loved ones and cognitively restructuring the disaster experience were associated with PTS and PTG, whereas communication activities confirming disaster reports and assisting with disaster recovery were associated solely with PTG. Results illustrate the need for robust disaster communication ecologies to facilitate public disaster mental health response and coordination.

Ethnicity, income, and disaster preparedness in Deep South Texas, United States

This paper examines the influence of a series of demographic and socioeconomic factors on preparedness outcomes for a sample of residents of the Rio Grande Valley in the southernmost part of Texas, United States. Data were collected as part of the regional Pulse of the Valley Study, a general social survey of south Texas residents conducted by the Center for Survey Research at the University of Texas-Rio Grande Valley. The purpose of this investigation is to understand better the effects of ethnicity and income on preparedness within a region of the US that suffers from widespread poverty and limited infrastructure and is prone to flooding and hurricanes. Taken together, the results suggest that while age, disaster experience, and income are associated with preparedness, the relationship between preparedness and ethnicity remains complex. Furthermore, policymakers should consider initiatives that address the socioeconomic and other issues that shape preparedness for a disaster.

Preparedness Perceptions, Sociodemographic Characteristics, and Level of Household Preparedness for Public Health Emergencies: Behavioral Risk Factor Surveillance System, 2006-2010

Our objective was to inform state and community interventions focused on increasing household preparedness by examining the association between self-reported possession of household disaster preparedness items (ie, a 3-day supply of food and water, a written evacuation plan, and a working radio and flashlight) and perceptions of household preparedness on a 3-point scale from "well prepared" to "not at all prepared." Data were analyzed from 14 states participating in a large state-based telephone survey: the 2006-2010 Behavioral Risk Factor Surveillance System (BRFSS) (n = 104,654). Only 25.3% of the population felt they were well prepared, and only 12.3% had all 5 of the recommended items. Fewer than half the households surveyed had 4 or more of the recommended preparedness items (34.1%). Respondents were more likely to report their households were well prepared as the number of preparedness items possessed by their household increased. Risk factors for having no preparedness items were: younger age, being female, lower levels of education, and requesting the survey to be conducted in Spanish. To increase household disaster preparedness, more community-based preparedness education campaigns targeting vulnerable populations, such as those with limited English abilities and lower reading levels, are needed.

Assessing disaster preparedness among latino migrant and seasonal farmworkers in eastern North Carolina

Natural disasters including hurricanes, floods, earthquakes, tornadoes, and fires often involve substantial physical and mental impacts on affected populations and thus are public health priorities. Limited research shows that vulnerable populations such as the low-income, socially isolated migrant and seasonal farmworkers (MSFW) are particularly susceptible to the effects of natural disasters. This research project assessed the awareness, perceived risk, and practices regarding disaster preparedness and response resources and identified barriers to utilization of community and government services during or after a natural disaster among Latino MSFWs' and their families. Qualitative (N = 21) focus groups (3) and quantitative (N = 57) survey methodology was implemented with Latino MSFWs temporarily residing in rural eastern North Carolina to assess perceived and actual risk for natural disasters. Hurricanes were a top concern among the sample population, many participants shared they lacked proper resources for an emergency (no emergency kit in the house, no evacuation plan, no home internet, a lack of knowledge of what should be included in an emergency kit, etc.). Transportation and language were found to be additional barriers. Emergency broadcasts in Spanish and text message alerts were identified by the population to be helpful for disaster alerts. FEMA, American Red Cross, local schools and the migrant clinic were trusted places for assistance and information. In summary, tailored materials, emergency alerts, text messages, and news coverage concerning disaster threats should be provided in the population's native language and when feasible delivered in a culturally appropriate mechanism such as "charlas" (talks) and brochures.

Latino social network dynamics and the Hurricane Katrina disaster

The aim of this qualitative research was to examine the dynamics of existing and emerging social networks among Latino survivors of Hurricane Katrina. Data were generated through individual, in-depth interviews conducted with 65 Latinos within six months of the storm striking the Gulf Coast of the United States in August 2005. The findings illustrated both the role of social networks in gathering information, making decisions and accessing resources, and how these existing social networks were disrupted and strained by overwhelming needs. Broader structural issues, including poverty and a lack of transportation, combined with marginalised status as immigrants, further constrained access to essential information and resources. In response, new, if temporary, social networks emerged, based primarily on shared nationality, language, and a sense of collective commitment. Practice implications include the need to consider the social network dynamics of marginalised groups in developing innovative strategies to overcome structural barriers to accessing resources essential for disaster preparedness and survival.

Improving Latino disaster preparedness using social networks

BACKGROUND

Culturally targeted, informal social networking approaches to improving disaster preparedness have not been empirically tested.

PURPOSE

In partnership with community health promoters and the Los Angeles County Department of Public Health, this study tested a disaster preparedness program for Latino households.

DESIGN

This study had a community-based, randomized, longitudinal cohort design with two groups and was conducted during February-October 2007. Assessments were made at baseline and 3 months. Analyses were carried out January-October 2008.

SETTINGS/PARTICIPANTS

Community-based study of 231 Latinos living in Los Angeles County.

INTERVENTION

Participants were randomly assigned to attending platicas (small-group discussions led by a health promoter/promotora de salud) or receiving "media" (a culturally tailored mailer). A total of 187 (81.0%) completed the 3-month follow-up.

MAIN OUTCOME MEASURE

A self-reported disaster preparedness checklist was used.

RESULTS

Among participants who did not have emergency water pre-intervention, 93.3% of those in the platica arm had it at follow-up, compared to 66.7% in the media arm (p=0.003). Among participants who did not have food pre-intervention, 91.7% in the platica arm reported it at follow-up, compared to 60.6% in the media arm (p=0.013). Finally, among participants who did not have a family communication plan pre-intervention, 70.4% in the platica arm reported one at follow-up, compared to 42.3% in the media arm (p=0.002).

CONCLUSIONS

Although both arms improved in stockpiling water and food and creating a communication plan, the platica arm showed greater improvement than the media group.