Heat Risk in Markwell, NSW: 2026 Assessment
Heat Risk Score
6.0/10Markwell is likely to experience more frequent and intense heatwaves. This poses a risk to vulnerable populations, such as the elderly and those with chronic health conditions.
Key Facts
- Heat Risk
- Markwell is likely to experience more frequent and intense heatwaves. This poses a risk to vulnerable populations, such as the elderly and those with chronic health conditions.
- Trend
- increasing
- Suburb
- Markwell, NSW
- Overall Risk
- Medium
- Postcode
- 2423
- Highest high-risk exposure
- 15.8% of land (bushfire)
Heat Risk Analysis
Markwell 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 Markwell 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.
Increased frequency of days exceeding 35°C is projected.
Get an address-level heat risk assessment from ClimateNest for Markwell including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.
Markwell (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 bushfire (15.8% of land in high-risk zones), riverine flood (8.9% of land in high-risk zones), surface flood (7% of land in high-risk zones). Exposure is not uniform across Markwell — 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
Record-breaking temperatures caused heat stress and placed strain on infrastructure.
Adaptation & Mitigation Actions
Improve Flood Defenses
Near-termInvest in improved drainage infrastructure and flood levees to protect properties from inundation.
Est. cost: High
Bushfire Preparedness
Near-termImplement community education programs and support residents in preparing their properties for bushfires.
Est. cost: Medium
Heatwave Action Plan
ImmediateDevelop a heatwave action plan to protect vulnerable populations, including cooling centers and public awareness campaigns.
Est. cost: Low
Water Resource Management
Long-termImplement strategies to conserve water resources and manage the impacts of drought.
Est. cost: Medium
Council & Emergency Services
Explore Markwell Risk Reports
View other climate risk assessments for Markwell:
Frequently Asked Questions
How hot does Markwell get in summer?
Markwell in New South Wales experiences summer temperatures consistent with the regional climate. BOM publishes historical temperature data for weather stations near Markwell. Get a property-specific heat exposure assessment with projected cooling costs from ClimateNest.
Is extreme heat increasing in Markwell?
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 Markwell 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 Markwell and the performance of your building envelope.
What heat mitigation measures work best in Markwell?
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 Markwell is exposed to high bushfire risk?
ClimateNest's hazard overlay maps 15.8% of Markwell in high-risk zones for bushfire, with a further 65.2% 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 Markwell Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Markwell, New South Wales, covering flood, bushfire, sea level rise and more.
What A$69 could save you from
*Industry sources: ICA, APRA, RBA
Full report from A$69 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections