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Week 5 Case Study

Heatwave in the Tower

The Scenario

South-East Queensland is on day four of an extreme heatwave. The Bureau of Meteorology has recorded maximum temperatures above 42°C for three consecutive days in the Greater Brisbane area, with overnight minimums not dropping below 28°C. Queensland Ambulance Service (QAS) has activated its extreme heat surge plan, with call volumes 35% above normal. Paramedic Megan and her partner Josh are working from the Woolloongabba station, and it is their third consecutive 12-hour shift during the heatwave.

At 15:40, they are dispatched to a Priority 1 call at a public housing tower block in South Brisbane—a 14-storey concrete building constructed in the 1970s. The caller is a neighbour who hasn't seen 81-year-old Neville for two days and found his door unlocked. The building has no central air conditioning, no communal cool spaces, and the lift has been intermittently out of service. Neville lives on the 11th floor.

Megan and Josh find Neville lying on his bed in a stifling one-bedroom unit. The windows are closed (Neville keeps them shut due to traffic noise and fear of break-ins), and a small pedestal fan is blowing hot air. The room temperature, measured by Megan's portable thermometer, is 39°C. Neville is confused, flushed, and has hot, dry skin. Vitals: GCS 13 (E3 V4 M6), temp 40.2°C (tympanic), HR 118, BP 88/54, RR 26, SpO2 93%. He has a history of congestive heart failure and takes frusemide (a diuretic), which has likely worsened his dehydration. His fridge contains a bottle of milk (expired), some bread, and little else. There is no air conditioning unit. His landline phone is on the hook. He does not own a mobile phone or a computer. A notice from the building manager about the heatwave and a link to an online heat safety resource was slipped under his door—but it is still sitting unopened on the floor. Neville is a widower; his wife died 18 months ago. He tells Megan, in lucid moments, "I didn't know it was going to be this bad. Nobody told me."

Discussion Questions

1 Identify the environmental determinants of health contributing to Neville's heat-related illness. Consider both the natural environment (climate, temperature extremes) and the built environment (building design, lack of cooling, high-rise living). How do these interact?
2 Discuss climate change as a public health threat. How are heatwaves projected to change in frequency, duration, and intensity in South-East Queensland over the coming decades? What are the health impacts of extreme heat beyond heat stroke (e.g., cardiovascular events, renal injury, mental health)?
3 Neville is experiencing digital exclusion—he has no internet, no smartphone, and could not access the online heat safety resource. Discuss digital exclusion as an emerging determinant of health. How does the shift to digital health information and services create new health inequities, particularly for elderly and low-income populations?
4 Analyse the urban heat island effect and how building characteristics (concrete high-rise, no cross-ventilation, west-facing aspect, dark roof materials) amplify heat exposure. What built environment interventions could reduce heat-related illness in public housing (e.g., passive cooling, green infrastructure, retrofitting)?
5 Neville's diuretic medication (frusemide) increased his vulnerability to dehydration during the heatwave. Discuss the concept of iatrogenic risk during environmental extremes and the role of GPs and pharmacists in proactive medication review before predicted heatwave events.
6 What public health interventions could have prevented Neville's presentation? Consider interventions at the individual level (welfare checks), community level (cool spaces, buddy systems), and policy level (housing standards, heatwave early warning systems with non-digital reach).

Key Concepts Applied

Environmental Determinants

The physical environment—climate, air quality, housing, and urban design—directly shapes health outcomes. Neville's built environment became life-threatening.

Climate Change & Health

Increasing heatwave frequency and intensity are a direct consequence of climate change, making extreme heat a growing public health emergency.

Digital Exclusion

People without internet access or digital literacy miss critical health warnings, telehealth services, and online resources, creating a new axis of health inequity.

Built Environment

Building design, urban density, green space, and housing quality directly affect health. Public housing towers can become heat traps during extreme events.

Urban Heat Island Effect

Urban areas with dense concrete and limited vegetation trap and radiate heat, creating temperatures significantly higher than surrounding rural areas.

Vulnerability & Intersectionality

Neville's age, poverty, isolation, medications, and digital exclusion compound to create extreme vulnerability—no single factor alone caused this crisis.

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