Heat Risk in The Marra, NSW: 2026 Assessment
Heat Risk Score
7.0/10The Marra experiences high heat risk with increasing average temperatures and more frequent heatwave events. This poses a threat to vulnerable populations.
Key Facts
- Heat Risk
- The Marra experiences high heat risk with increasing average temperatures and more frequent heatwave events. This poses a threat to vulnerable populations.
- Trend
- increasing
- Suburb
- The Marra, NSW
- Overall Risk
- Medium
- Postcode
- 2831
- Highest high-risk exposure
- 17.3% of land (bushfire)
Heat Risk Analysis
The Marra 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 The Marra 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.
The Marra experiences several days above 40°C during summer, increasing the risk of heat stress.
Get an address-level heat risk assessment from ClimateNest for The Marra including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
The Marra (postcode 2831) 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 (17.3% of land in high-risk zones), riverine flood (7.6% of land in high-risk zones), surface flood (4.6% of land in high-risk zones). Exposure is not uniform across The Marra — 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
Historical Events
Prolonged heatwave conditions with temperatures exceeding 40°C for several days.
Adaptation & Mitigation Actions
Improve Flood Defenses
Near-termUpgrade drainage infrastructure and implement flood barriers to protect properties.
Est. cost: Medium
Develop Heatwave Management Plan
ImmediateEstablish cooling centers and provide support for vulnerable residents during heatwaves.
Est. cost: Low
Enhance Bushfire Preparedness
Near-termConduct regular bushfire risk assessments and implement vegetation management programs.
Est. cost: Medium
Promote Water Conservation
Long-termImplement water-saving measures to address drought conditions and ensure water security.
Est. cost: Low
Council & Emergency Services
Explore The Marra Risk Reports
View other climate risk assessments for The Marra:
Frequently Asked Questions
How hot does The Marra get in summer?
The Marra in New South Wales experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near The Marra. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in The Marra?
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 The Marra 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 The Marra and the performance of your building envelope.
What heat mitigation measures work best in The Marra?
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 The Marra is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 17.3% of The Marra in high-risk zones for bushfire, with a further 62.8% 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 The Marra Safe from Climate Risk?
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