Heat Risk in Gregory Hills, WA: 2026 Assessment
Heat Risk Score
4.2/10Elevated heat risk — prolonged heatwaves and high summer temperatures
Key Facts
- Heat Risk
- Elevated heat risk — prolonged heatwaves and high summer temperatures
- Trend
- increasing
- Suburb
- Gregory Hills, WA
- Overall Risk
- Moderate
- Postcode
- 6535
- Highest high-risk exposure
- 12.8% of land (bushfire)
Heat Risk Analysis
Gregory Hills in Western Australia faces moderate 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 Gregory Hills 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.
CSIRO climate projections indicate that under a high-emissions scenario, many parts of Western Australia could experience a doubling in the number of days over 35 °C by 2050. For Gregory Hills, this means cooling costs and occupant comfort will become increasingly important considerations.
Get an address-level heat risk assessment from ClimateNest for Gregory Hills including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
Gregory Hills (postcode 6535) 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 (12.8% of land in high-risk zones), riverine flood (7.4% of land in high-risk zones), surface flood (6.9% of land in high-risk zones). Exposure is not uniform across Gregory Hills — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.
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Frequently Asked Questions
How hot does Gregory Hills get in summer?
Gregory Hills in Western Australia experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near Gregory Hills. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in Gregory Hills?
Australia-wide, extreme heat events have become more frequent since the mid-20th century, and this trend is consistent with CSIRO climate projections for Western Australia. Continued warming is likely through 2050 under all emissions scenarios.
How does heat affect energy costs for Gregory Hills 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 Gregory Hills and the performance of your building envelope.
What heat mitigation measures work best in Gregory Hills?
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 Gregory Hills is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 12.8% of Gregory Hills in high-risk zones for bushfire, with a further 59.1% 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 Gregory Hills Safe from Climate Risk?
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