Evaluating Mortality Response Associated with Two Different Nordic Heat Warning Systems in Riga, Latvia.

Background and objectives: Progressing climate change is accompanied by a worldwide increase in the intensity, frequency, and duration of heat wave events. Research has shown that heat waves are an emerging public health problem, as they have a significant impact on mortality. As studies exploring this relationship are scarce for Latvia, this study aims to investigate the short-term associations between heat waves and all-cause mortality as well as cause-specific mortality, during the summer months (May-September) in Riga. Materials and Methods: An ecological time series study using daily reported mortality and temperature data from Riga between 2009 and 2015 was employed. Heat waves were defined based on the categories of the Latvian and Swedish heat warning system. Using a Quasi-Poisson regression, the relationships between heat waves and all-cause as well as cause-specific mortality were investigated. Results: Heat waves in Riga were associated with a 10% to 20% increase in the risk of all-cause mortality, depending on the applied heat wave definition, compared to days with normal temperature. In addition, heat-related mortality was found to increase significantly in the ≥65 age group between 12% and 22% during heat waves. In terms of cause-specific mortality, a significant increase of approximately 15% to 26% was observed for cardiovascular mortality. No significant associations were found between heat waves and respiratory or external causes of mortality. Conclusion: These results indicate that there are short-term associations between heat waves and all-cause as well as cardiovascular mortality in Riga and that heat waves therefore represent a public health problem in this Baltic city.

Systematic comparison of recommendations for safe messaging about suicide in public communications.

BACKGROUND: The diversity of guidelines for safe public messaging about suicide and the heterogeneous scientific research on the topic warrants comparisons of guidelines and analysis of the relevance of research findings to determine best practices. METHODS: We searched databases and websites for organizations' guidelines concerning safe public messaging on suicide, and relevant research articles. RESULTS: We identified 24 public messaging guidelines, 11 terminology guidelines and 44 research papers. No recommendations were in all guidelines, with more agreement on what not to do than on what to do. Recommendations in over half of guidelines are: avoid glorifying suicide, do not describe suicide methods, don't say suicide in inexplicable or explain simplistically, do not state that suicide is frequent in specific circumstances, encourage help seeking. There were disagreements on including personal details about people who died by suicide, and agreement to avoid: "committed suicide," "completed suicide," "successful suicide," "failed suicide/attempt" "unsuccessful suicide/attempt". Only "died by suicide" was recommended by a majority. Some recommended and some said to avoid: "Suicide attempt," "attempt to end his life," "attempted suicide," "non-fatal attempt at suicide," "unintentional (death)," "intentional self-harm," "suicidal ideation," "completed suicide," "survivor," "suicide loss survivor." Research papers had a wide range of objectives, methodologies, media studied and target populations. None provided empirical data that could help support or refute any recommendations. LIMITATIONS: Lack of justifications for guidelines and scarce relevant research makes validation of recommendations challenging. CONCLUSIONS: Research is needed to validate recommendations and terminology and develop consensus on guidelines for public messages, and determine if media guidelines for reporting on suicide are relevant for public messaging who's goal is to inform and educate rather than report news.

Establishing Heat Alert Thresholds for the Varied Climatic Regions of British Columbia, Canada.

Following an extreme heat event in 2009, a Heat Alert and Response System (HARS) was implemented for the greater Vancouver area of British Columbia (BC), Canada. This system has provided a framework for guiding public health interventions and assessing population response and adaptation to extreme heat in greater Vancouver, but no other parts of BC were covered by HARS. The objective of this study was to identify evidence-based heat alert thresholds for the Southwest, Southeast, Northwest, and Northeast regions to facilitate the introduction of HARS across BC. This was done based on a national approach that considers high temperatures on two consecutive days and the intervening overnight low, referred to as the high-low-high approach. Daily forecast and observed air temperatures and daily mortality counts for May through September of 2004 through 2016 were obtained. For each date (dayt), dayt-2 forecasts were used to assign high temperatures for dayt and dayt+1 and the overnight low. A range of high-low-high threshold combinations was assessed for each region by finding associations with daily mortality using time-series models and other considerations. The following thresholds were established: 29-16-29 °C in the Southwest; 35-18-35 °C in the Southeast; 28-13-28 °C in the Northwest; and 29-14-29 °C in the Northeast. Heat alert thresholds for all regions in BC provide health authorities with information on dangerously hot temperature conditions and inform the activation of protective public health interventions.