Heat Risk in Upper Myall, NSW: 2026 Assessment
Heat Risk Score
5.0/10Heatwaves are becoming more frequent and intense, posing a risk to vulnerable populations.
Key Facts
- Heat Risk
- Heatwaves are becoming more frequent and intense, posing a risk to vulnerable populations.
- Trend
- increasing
- Suburb
- Upper Myall, NSW
- Overall Risk
- Medium
- Postcode
- 2423
- Highest high-risk exposure
- 12.2% of land (surface flood)
Heat Risk Analysis
Upper Myall 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 Upper Myall 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 typically occur during the summer months, with temperatures exceeding 35°C for several consecutive days.
Get an address-level heat risk assessment from ClimateNest for Upper Myall including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
Upper Myall (postcode 2423) 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 surface flood (12.2% of land in high-risk zones), bushfire (10.1% of land in high-risk zones), extreme wind (4.5% of land in high-risk zones). Exposure is not uniform across Upper Myall — 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
A prolonged heatwave resulted in increased demand for emergency services and strain on infrastructure.
Adaptation & Mitigation Actions
Develop a community bushfire preparedness plan
ImmediateEstablish a community-led plan to prepare for and respond to bushfire events, including evacuation routes, communication strategies, and property protection measures.
Est. cost: Low
Upgrade stormwater infrastructure
Near-termInvest in upgrading stormwater drainage systems to improve capacity and reduce the risk of flooding during heavy rainfall events.
Est. cost: Medium
Implement a heatwave response plan
ImmediateDevelop a plan to protect vulnerable populations during heatwave events, including establishing cooling centers, providing public awareness campaigns, and ensuring access to healthcare services.
Est. cost: Low
Promote water conservation measures
Long-termEncourage residents to adopt water-saving practices to reduce water demand during periods of drought and heatwaves.
Est. cost: Low
Enhance building codes for climate resilience
Near-termUpdate building codes to incorporate climate resilience measures, such as improved insulation, fire-resistant materials, and flood-proofing techniques.
Est. cost: Medium
Council & Emergency Services
Explore Upper Myall Risk Reports
View other climate risk assessments for Upper Myall:
Frequently Asked Questions
How hot does Upper Myall get in summer?
Upper Myall in New South Wales experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near Upper Myall. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in Upper Myall?
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 Upper Myall 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 Upper Myall and the performance of your building envelope.
What heat mitigation measures work best in Upper Myall?
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 Upper Myall is exposed to high surface flood risk?
ClimateNest's hazard overlay maps 12.2% of Upper Myall in high-risk zones for surface flood, with a further 65.5% 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 Upper Myall Safe from Climate Risk?
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