Climate Risk in Thornleigh, NSW
Thornleigh faces moderate risks from flooding, bushfires, and heatwaves, which are projected to increase with climate change. The suburb's proximity to bushland elevates bushfire danger, while heavy rainfall can cause flooding in certain areas. Residents should prepare for more frequent and intense extreme weather events.
Is Thornleigh Safe from Climate Risk?
Enter your address below for an instant climate risk assessment for Thornleigh, New South Wales, covering flood, bushfire, sea level rise and more.
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Overall Risk Score
Hazard Breakdown
Flood, bushfire, heat, coastal and storm exposure are all assessed in this area. The score that matters is the property's own: a ClimateNest report scores the address across eight hazards, with insurance and value projections to 2050.
Climate Hazard Breakdown for Thornleigh
Flood
Thornleigh faces a moderate risk of flooding, primarily from heavy rainfall events and nearby waterways. Properties in low-lying areas are particularly vulnerable.
Key drivers:
- ·Increased rainfall intensity
- ·Urban development
Bushfire
Thornleigh has a high bushfire risk due to its proximity to significant bushland areas. Hot, dry conditions and strong winds can exacerbate the risk.
Key drivers:
- ·Dry vegetation
- ·High temperatures
Heat
Thornleigh experiences moderate heat risk, with increasing average temperatures and more frequent heatwave events expected in the future.
Key drivers:
- ·Climate change
- ·Urban heat island effect
Coastal
Thornleigh has a very low coastal risk due to its distance from the coastline. Sea level rise and coastal erosion are not significant concerns.
Key drivers:
- ·Distance from coast
Wind
Data being compiled
Storm
Data being compiled
Social
Data being compiled
Energy
Data being compiled
In-Depth Climate Risk Guides for Thornleigh
Property buying guide with climate risk assessment
Flood zone mapping, historical events, and projections
BAL assessment, vegetation proximity, and fire history
Multi-hazard safety assessment to 2050
Severe weather, hail, and wind risk analysis
Extreme heat days, urban heat island, and cooling costs
Premium estimates and insurance availability
Climate-adjusted property investment analysis
Detailed Hazard Analysis
heat Risk
Thornleigh experiences moderate heat risk, with increasing average temperatures and more frequent heatwave events expected in the future.
Primary Drivers
- ·Climate change
- ·Urban heat island effect
flood Risk
Thornleigh faces a moderate risk of flooding, primarily from heavy rainfall events and nearby waterways. Properties in low-lying areas are particularly vulnerable.
Primary Drivers
- ·Increased rainfall intensity
- ·Urban development
- ·Climate change
coastal Risk
Thornleigh has a very low coastal risk due to its distance from the coastline. Sea level rise and coastal erosion are not significant concerns.
Primary Drivers
- ·Distance from coast
bushfire Risk
Thornleigh has a high bushfire risk due to its proximity to significant bushland areas. Hot, dry conditions and strong winds can exacerbate the risk.
Primary Drivers
- ·Dry vegetation
- ·High temperatures
- ·Strong winds
- ·Climate change
What This Means for Property Owners
Insurance Outlook
Insurance premiums may increase due to the rising risks of flooding and bushfires.
Price Impact
Properties in high-risk areas may experience a decrease in value.
Buyer Checklist
- 1.Check flood maps and bushfire prone area designations.
- 2.Assess the property's vulnerability to extreme weather events.
- 3.Obtain adequate insurance coverage.
- 4.Consider energy efficiency and water conservation measures.
How the region's climate is projected to change
Regional projections, not a forecast for this street. Figures are from the WA Department of Water and Environmental Regulation's climate projections for the South Western Flatlands region, which draws on CSIRO and Bureau of Meteorology modelling.
Temperature
+0.5 to 1.1°C by 2030
Above the 1986–2005 climate, on all emissions scenarios. By 2090, 1.2 to 2.0°C under intermediate emissions or 2.6 to 4.0°C under high emissions.
Rainfall
Winter rain down up to 15% by 2030
The South West has been drying since 1970, and the decline has been larger than anywhere else in Australia. Heavy rainfall events are projected to become more intense even as totals fall.
Fire weather
Harsher, magnitude uncertain
High confidence that fire weather becomes harsher, low confidence in the size of the change, because it depends heavily on summer rainfall.
Sea level
+0.12 m by 2030
At the Fremantle gauge, range 0.07 to 0.16 m. Very high confidence that sea levels continue to rise through the century.
Source: Department of Water and Environmental Regulation (WA), Western Australian climate projections: summary, September 2021, South Western Flatlands chapter. Read the projections →
Adaptation Recommendations
Improve Flood Defenses
Near-termInstall flood barriers, improve drainage systems, and elevate vulnerable equipment to protect properties from flood damage.
Est. cost: Medium
Learn moreBushfire Preparedness
ImmediateCreate a bushfire survival plan, clear vegetation around homes, and install fire-resistant building materials.
Est. cost: Low to Medium
Learn moreHeatwave Preparedness
Near-termInstall air conditioning, improve home insulation, and establish cooling centers for vulnerable residents.
Est. cost: Medium to High
Learn moreWater Conservation
Long-termImplement water-saving measures, such as installing rainwater tanks and using water-efficient appliances, to reduce water demand during droughts.
Est. cost: Low to Medium
Learn moreAbout Thornleigh's Climate Risk Profile
Thornleigh, located in the Upper North Shore of Sydney, is increasingly vulnerable to the impacts of climate change. The primary risks include flooding from heavy rainfall, bushfires due to its proximity to bushland, and heatwaves during the summer months.
Flooding is a concern in low-lying areas of Thornleigh, particularly those near waterways. Climate change is expected to increase the intensity of rainfall events, leading to a higher risk of flash flooding and riverine flooding. Residents should be aware of local flood warnings and have a plan in place.
The bushfire risk in Thornleigh is significant due to the surrounding bushland. Hot, dry conditions and strong winds can quickly spread fires, threatening homes and lives. Regular property maintenance, such as clearing gutters and removing flammable materials, is essential for mitigating this risk.
Heatwaves are becoming more frequent and intense in Thornleigh, posing a health risk to vulnerable populations, such as the elderly and those with chronic illnesses. Staying hydrated, seeking air-conditioned environments, and avoiding strenuous activity during the hottest parts of the day are important precautions.
While coastal risks are minimal due to Thornleigh's inland location, the broader impacts of climate change, such as disruptions to supply chains and increased insurance costs, may still affect the suburb. Adapting to these changes requires a community-wide effort to reduce emissions and build resilience.
Suburb pages describe the local picture. The address-level assessment, with its data sources and its dollar projections, is in the ClimateNest report.
Local Government Resources
Hornsby Shire Council
Frequently Asked Questions
What are the main climate change risks in Thornleigh?
The main climate change risks in Thornleigh are flooding, bushfires, and heatwaves. These risks are projected to increase in the future due to climate change.
How can I prepare my home for a bushfire in Thornleigh?
To prepare your home for a bushfire, create a bushfire survival plan, clear vegetation around your home, and install fire-resistant building materials. Regularly maintain your property to reduce fire hazards.
What should I do during a heatwave in Thornleigh?
During a heatwave, stay hydrated, seek air-conditioned environments, and avoid strenuous activity during the hottest parts of the day. Check on vulnerable neighbors and family members.
Where can I find information about flood risks in Thornleigh?
You can find information about flood risks in Thornleigh on the Hornsby Shire Council website, including flood maps and emergency contacts.
How is Hornsby Shire Council addressing climate change?
Hornsby Shire Council has a climate change strategy that outlines actions to reduce emissions and build resilience to climate change impacts. Visit the council's website for more information.
Get your property's risk report
This suburb assessment covers the area. For a precise address-level climate risk report for any specific property in Thornleigh, use our analysis tool.
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What A$49 could save you from
*Industry sources: ICA, APRA, RBA
Full report from A$49 · Australian addresses only · 8 hazard scores · Insurance trajectory · 2030 & 2050 projections