South Australian Heat Health Warning System
Categories: Assessments of climate and health risks and GHG emissions, Heat and cold
Country: Australia
Organizations: South Australian Department for Health and Wellbeing
The intervention
The South Australia heat health warning system was developed after the extreme heatwave of January 2008-2009, which led to 374 deaths and over 2000 cases of illness or injury. The system incorporates public heat warnings, health advisories and targeted support for at-risk groups including the elderly, those with mental health conditions and the homeless. It supports the Telecross Redi program, operated by the Red Cross and funded by the Department of Human Services, which provides daily welfare calls to at-risk individuals. If clients do not respond, SA Police conduct home checks. Research shows HHWS interventions significantly reduce adverse health impacts and are cost-effective.
Success factors
The HHWS’s effectiveness lies in its integrated design that combines early warnings with direct social support mechanisms. The Telecross Redi program bridges emergency response and community care by ensuring continuous welfare monitoring during heatwaves. Its dual model of self-registration and referral via families or health workers increases accessibility. Evaluations show the HHWS delivers at least double the return on investment, with broader unquantified benefits such as improved well-being and community safety. By increasing public awareness and fostering cross-agency collaboration between health, social services, and law enforcement, the system has become a “no regret” adaptation strategy for extreme heat.
Recommendations
Governments aiming to implement a similar HHWS should integrate forecast-based public alerts with targeted support for vulnerable populations. Establishing partnerships across health, social, and emergency agencies enables efficient welfare monitoring and coordinated response. Regular evaluation of system performance and cost-effectiveness is essential, especially as climate and demographic factors evolve. Future systems should use prospective data collection and statistical tools like interrupted time series analysis to measure health impacts and adapt protocols accordingly. Embedding these programs within existing health and community services, supported by sustained funding and public communication campaigns, ensures scalability, inclusivity, and long-term resilience against escalating heat risks.
Key resources
- Australia’s National Health and Climate Strategy
- Evaluating cost benefits from a heat health warning system in Adelaide, South Australia
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