Heat Risk in Marrangaroo, NSW: 2026 Assessment
Heat Risk Score
7.0/10Marrangaroo experiences a high number of hot days annually, and heatwaves are becoming more frequent and intense. This poses a significant risk to vulnerable populations.
Key Facts
- Heat Risk
- Marrangaroo experiences a high number of hot days annually, and heatwaves are becoming more frequent and intense. This poses a significant risk to vulnerable populations.
- Trend
- increasing
- Suburb
- Marrangaroo, NSW
- Overall Risk
- High
- Postcode
- 2790
- Highest high-risk exposure
- 15.5% of land (bushfire)
Heat Risk Analysis
Marrangaroo in New South Wales faces elevated extreme heat risk. The Bureau of Meteorology (BOM) reports that Australia's average temperature has increased by approximately 1.5 °C since 1910, with the frequency of extreme heat days rising across most regions.
The urban heat island (UHI) effect can make built-up areas of Marrangaroo warmer than surrounding rural areas, particularly on summer nights. Dark roof materials, limited tree canopy cover, and heat-absorbing surfaces contribute to localised heat stress that varies by property.
Heatwaves are becoming more frequent and intense in recent years.
Get an address-level heat risk assessment from ClimateNest for Marrangaroo including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
Marrangaroo (postcode 2790) is tracked in ClimateNest's suburb hazard model, which maps the share of the suburb's land exposed to each hazard at high and moderate levels. The suburb's highest high-risk exposures are bushfire (15.5% of land in high-risk zones), riverine flood (12.7% of land in high-risk zones), surface flood (11.1% of land in high-risk zones). Exposure is not uniform across Marrangaroo — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.
Local Hazard Evidence
Adaptation & Mitigation Actions
Develop a Bushfire Survival Plan
ImmediateCreate a detailed plan for what to do in the event of a bushfire, including evacuation routes, emergency contacts, and a list of essential items to take with you.
Est. cost: Low
Improve Home Cooling
Near-termInstall air conditioning or fans to help keep your home cool during heatwaves. Consider energy-efficient options to reduce your carbon footprint.
Est. cost: Medium
Improve Flood Defenses
Near-termInstall flood barriers or sandbagging to protect your property from floodwaters. Ensure that your property is properly drained.
Est. cost: Medium
Plant Native Trees and Shrubs
Long-termPlanting native vegetation can help to reduce the risk of bushfires by creating a buffer zone around your property. It can also help to cool your home and reduce the urban heat island effect.
Est. cost: Low
Council & Emergency Services
Explore Marrangaroo Risk Reports
View other climate risk assessments for Marrangaroo:
Frequently Asked Questions
How hot does Marrangaroo get in summer?
Marrangaroo in New South Wales experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near Marrangaroo. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in Marrangaroo?
Australia-wide, extreme heat events have become more frequent since the mid-20th century, and this trend is consistent with CSIRO climate projections for New South Wales. Continued warming is likely through 2050 under all emissions scenarios.
How does heat affect energy costs for Marrangaroo properties?
Higher temperatures increase cooling demand, which raises electricity costs. ClimateNest provides energy cost projections based on your property's specific exposure to extreme heat days in Marrangaroo and the performance of your building envelope.
What heat mitigation measures work best in Marrangaroo?
Effective heat mitigation includes light-coloured roofing (cool roofs), ceiling and wall insulation, double-glazed windows, external shading, cross-ventilation design, and increasing tree canopy around the property. These measures reduce indoor temperatures and cooling costs.
What share of Marrangaroo is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 15.5% of Marrangaroo in high-risk zones for bushfire, with a further 72.4% in moderate-risk zones. Suburb-level exposure is not uniform — individual properties can differ from these averages, so an address-level check is recommended.
Is Marrangaroo Safe from Climate Risk?
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