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Climate Risk in Mortlake, NSW

Mortlake, New South Wales· City of Canada Bay· 2137
Medium Risk
Updated May 2026

Mortlake faces increasing risks from flooding, heatwaves, and coastal inundation due to climate change. While bushfire risk is relatively low, it is expected to increase. Residents should prepare for more frequent extreme weather events.

Overall Risk Score

55/100
Medium

Confidence: Medium

Hazard Breakdown

Flood
6.0
Bushfire
2.0
Heat
7.0
Coastal
7.0

Climate Hazard Breakdown for Mortlake

increasing

Flood

60/100

Mortlake faces a moderate risk of flooding due to its proximity to the Parramatta River. Climate change is expected to increase rainfall intensity, potentially worsening flood events.

Key drivers:

  • ·Increased rainfall intensity
  • ·Sea level rise
increasing

Bushfire

20/100

The risk of bushfire in Mortlake is relatively low due to its urban environment and distance from large bushland areas. However, increased temperatures and drier conditions could elevate the risk.

Key drivers:

  • ·Increased temperatures
  • ·Drier conditions
increasing

Heat

70/100

Mortlake is likely to experience more frequent and intense heatwaves. This poses a risk to vulnerable populations, especially the elderly and those with pre-existing health conditions.

Key drivers:

  • ·Rising global temperatures
  • ·Urban heat island effect
increasing

Coastal

70/100

Mortlake is exposed to coastal risks due to its location on the Parramatta River. Sea level rise and increased storm surges could lead to inundation and erosion.

Key drivers:

  • ·Sea level rise
  • ·Increased storm surge
stable

Wind

28/100

Moderate wind risk — East Coast Lows and gust fronts

stable

Storm

39/100

Moderate storm risk — severe thunderstorms and hail

stable

Social

21/100

Moderate social stability — mixed urban density

increasing

Energy

35/100

Moderate energy costs — climate-driven cooling demand

In-Depth Climate Risk Guides for Mortlake

Should I Buy

Property buying guide with climate risk assessment

Flood Risk

Flood zone mapping, historical events, and projections

Bushfire Risk

BAL assessment, vegetation proximity, and fire history

Climate Safety

Multi-hazard safety assessment to 2050

Storm Risk

Severe weather, hail, and wind risk analysis

Heat Risk

Extreme heat days, urban heat island, and cooling costs

Insurance Costs

Premium estimates and insurance availability

Investment Score

Climate-adjusted property investment analysis

Detailed Hazard Analysis

heat Risk

70/100

Mortlake is likely to experience more frequent and intense heatwaves. This poses a risk to vulnerable populations, especially the elderly and those with pre-existing health conditions.

Primary Drivers

  • ·Rising global temperatures
  • ·Urban heat island effect

Projections (RCP8.5)

2030

7.5

2050

8.0

Data source

flood Risk

60/100

Mortlake faces a moderate risk of flooding due to its proximity to the Parramatta River. Climate change is expected to increase rainfall intensity, potentially worsening flood events.

Primary Drivers

  • ·Increased rainfall intensity
  • ·Sea level rise
  • ·Urban development

Projections (RCP8.5)

2030

6.5

2050

7.0

Data source

coastal Risk

70/100

Mortlake is exposed to coastal risks due to its location on the Parramatta River. Sea level rise and increased storm surges could lead to inundation and erosion.

Primary Drivers

  • ·Sea level rise
  • ·Increased storm surge
  • ·Erosion

Projections (RCP8.5)

2030

7.5

2050

8.0

Data source

bushfire Risk

20/100

The risk of bushfire in Mortlake is relatively low due to its urban environment and distance from large bushland areas. However, increased temperatures and drier conditions could elevate the risk.

Primary Drivers

  • ·Increased temperatures
  • ·Drier conditions
  • ·Wind patterns

Projections (RCP8.5)

2030

2.5

2050

3.0

Data source

What This Means for Property Owners

Insurance Outlook

Insurance premiums may increase due to flood and coastal risks.

Price Impact

Properties in flood-prone areas may experience price stagnation or decline.

Buyer Checklist

  • 1.Check flood maps and historical flood data.
  • 2.Assess property's elevation and drainage.
  • 3.Consider the cost of flood insurance.
  • 4.Evaluate the property's vulnerability to heatwaves.
  • 5.Inquire about council's climate adaptation plans.

Local Climate Evidence

Flood Evidence

Nearest Waterway
Parramatta River
Elevation Range
5-15 meters
Flood Zone
Partially within flood zone

Some properties near the river are at higher risk of flooding.

View council flood map

Bushfire Evidence

Distance to Bushland
2 km to nearest bushland
Planning Overlay
Not significantly affected by bushfire overlay
Bushfire Prone Area
No

The area is mostly urbanized, reducing bushfire risk.

Heat Evidence

Avg January Max Temp
29.5°C
Heat Stress Days/Year
3 days

Heat stress events are projected to increase in frequency and intensity.

Coastal Evidence

Distance to Coast
0.5 km
Sea Level Rise Exposure
Low-lying areas exposed to sea level rise
Erosion Risk
Moderate erosion risk along the riverbank

Historical Climate Events

1990
floodModerate

Heavy rainfall caused flooding in low-lying areas along the Parramatta River.

Source
2007
stormModerate

A severe storm caused damage to property and infrastructure in Mortlake.

Source
2013
heatwaveModerate

A prolonged heatwave led to increased hospital admissions and strain on the electricity grid.

Source
2022
floodModerate

Significant rainfall events led to localized flooding in parts of Mortlake, impacting homes and businesses near the Parramatta River.

Source

Climate Outlook to 2050

Projections based on CSIRO and BOM climate modelling. Scenario: RCP8.5

HazardToday20302050
flood606.5(+0.5)7.0(+1.0)
bushfire202.3(+0.3)2.5(+0.5)
heat707.7(+0.7)8.2(+1.2)
coastal707.5(+0.5)8.0(+1.0)

By 2030, Mortlake is projected to experience more frequent and intense heatwaves, increased rainfall intensity, and rising sea levels. This will lead to a higher risk of flooding, heat stress, and coastal inundation.

CSIRO Climate Projections

Adaptation Recommendations

Improve drainage infrastructure

Near-term

Upgrade drainage systems to handle increased rainfall intensity and reduce the risk of flooding.

Est. cost: High

Learn more

Implement heatwave early warning system

Immediate

Develop a system to alert residents of impending heatwaves and provide guidance on how to stay safe.

Est. cost: Low

Learn more

Protect and restore coastal ecosystems

Long-term

Preserve and enhance mangroves and other coastal ecosystems to provide natural protection against sea level rise and storm surges.

Est. cost: Medium

Learn more

Raise awareness of climate risks

Immediate

Educate residents about the risks of climate change and how to prepare for extreme weather events.

Est. cost: Low

Learn more

Promote water conservation

Near-term

Encourage residents and businesses to conserve water to reduce strain on water resources during droughts and heatwaves.

Est. cost: Low

Learn more

About Mortlake's Climate Risk Profile

Mortlake, a suburb in Sydney's Inner West, is increasingly vulnerable to the impacts of climate change. The suburb's proximity to the Parramatta River makes it susceptible to flooding, which is expected to worsen with increased rainfall intensity and sea level rise.

Heatwaves are also a growing concern for Mortlake. Rising global temperatures and the urban heat island effect are likely to lead to more frequent and intense heatwaves, posing a significant risk to public health, particularly for vulnerable populations.

Coastal inundation is another threat to Mortlake. Sea level rise and increased storm surges could lead to the inundation of low-lying areas, causing damage to property and infrastructure.

While the risk of bushfire is relatively low compared to other parts of NSW, it is expected to increase with drier conditions and higher temperatures. Residents should be aware of the potential for bushfires and take steps to protect their properties.

Data sources: BOM · CSIRO · NSW State Emergency Service · City of Canada Bay Council

Local Government Resources

City of Canada Bay

Climate StrategyFlood MapsEmergency Services

Frequently Asked Questions

What are the main climate change risks in Mortlake?

The main climate change risks in Mortlake are flooding, heatwaves, and coastal inundation. Bushfire risk is relatively low but expected to increase.

How will climate change affect property values in Mortlake?

Properties in flood-prone areas may experience price stagnation or decline. Insurance premiums may also increase due to flood and coastal risks.

What is the council doing to address climate change in Mortlake?

The City of Canada Bay has a climate strategy that includes measures to reduce greenhouse gas emissions and adapt to the impacts of climate change.

How can I prepare for heatwaves in Mortlake?

Stay indoors in air-conditioned buildings, drink plenty of water, and avoid strenuous activity during the hottest part of the day.

Where can I find information about flood risks in Mortlake?

You can find information about flood risks on the City of Canada Bay website and the NSW State Emergency Service website.

What should I do during a flood in Mortlake?

Stay informed about flood warnings, move to higher ground if necessary, and avoid driving through floodwaters.

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