Article Text

Download PDFPDF

Examining the relationship between heatwaves and fatal drowning: a case study from Queensland, Australia
  1. Amy E Peden1,2,
  2. Hannah M Mason2,
  3. Jemma Chandal King2,
  4. Richard Charles Franklin2
  1. 1 School of Population Health, UNSW Sydney, Kensington, New South Wales, Australia
  2. 2 College of Public Health, Medical and Veterinary Sciences, James Cook University, Douglas, Queensland, Australia
  1. Correspondence to Dr Richard Charles Franklin, College of Public Health, Medical and Veterinary Sciences, James Cook University, James Cook University, Queensland, Australia; Richard.Franklin{at}jcu.edu.au

Abstract

Background Globally, drowning is a leading cause of injury-related harm, which is heavily impacted by environmental conditions. In Australia, fatal unintentional drowning peaks in summer, yet the impact of prolonged periods of hot weather (heatwave) on fatal drowning has not previously been explored.

Methods Using a case-crossover approach, we examined the difference in drowning risk between heatwave and non-heatwave days for the Australian state of Queensland from 2010 to 2019. Heatwave data, measured by the excess heat factor, were acquired from the Bureau of Meteorology. Incidence rate ratios (IRRs) were calculated by sex, age of drowning decedent, category of drowning incident (International Classification of Diseases−10 codes) and heatwave severity. Excess drowning mortality during heatwaves was also calculated.

Results Analyses reveal increased fatal drowning risk during heatwave for males (IRR 1.22, 95% CI 0.92 to 1.61), people aged 65+ years (IRR 1.36, 95% CI 0.83 to 2.24), unintentional drowning (IRR 1.28, 95% CI 0.98 to 1.69) and during severe heatwaves (IRR 1.26, 95% CI0.88 to 1.82). There were 13 excess drowning deaths due to heatwave over the study period.

Discussion The findings confirm an increased risk of fatal drowning during heatwaves. With increased likelihood and severity of heatwaves, this information should be used to inform drowning prevention, in particular the timing of public awareness campaigns and patrolling of supervised aquatic locations.

Conclusions Water safety and patrolling organisations, as well as first responders, need to prepare for more drowning deaths during heatwave conditions. In addition, drowning prevention education ahead of heatwaves is needed for recreational swimmers, and older people, particularly those with comorbidities which may be further exacerbated by a heatwave.

  • Exposure
  • Mortality
  • Drowning
  • Case Study
  • Policy

Data availability statement

Data may be obtained from a third party and are not publicly available. The data that support the findings of this study are available from the Australian Bureau of Statistics and the Bureau of Meteorology. Restrictions apply to the availability of these data, which were used under license for this study. Data are available from the corresponding author with the permission of the Australian Bureau of Statistics and the Bureau of Meteorology.

Statistics from Altmetric.com

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.

Data availability statement

Data may be obtained from a third party and are not publicly available. The data that support the findings of this study are available from the Australian Bureau of Statistics and the Bureau of Meteorology. Restrictions apply to the availability of these data, which were used under license for this study. Data are available from the corresponding author with the permission of the Australian Bureau of Statistics and the Bureau of Meteorology.

View Full Text

Footnotes

  • Twitter @amyepeden, @Franklin_R_C

  • Contributors Conceptualisation: RCF and AEP; methodology, HM, RCF and AEP; validation, HM and RCF; formal analysis, HM; resources, RCF; data curation, HM and RCF; writing—original draft preparation, AEP; writing—review and editing, AEP, HM, JCK and RCF; visualisation, HM; supervision, RCF; project administration and guarantor, HM and RCF; funding acquisition, RCF. All authors have read and agreed to the published version of the manuscript.

  • Funding This research was conducted as an unfunded component of a larger project funded by the Queensland Department of Environment and Science, (no grant number). Author AEP is supported by an Australian National Health and Medical Research Council (NHMRC) Emerging Leadership Fellowship (Grant ID: APP2009306).

  • Competing interests None declared.

  • Patient and public involvement Patients and/or the public were involved in the design, or conduct, or reporting, or dissemination plans of this research. Refer to the Methods section for further details.

  • Provenance and peer review Not commissioned; externally peer reviewed.