Crafting a Storm Surge and Hurricane Risk Rating for Coastal Properties

Crafting a Storm Surge and Hurricane Risk Rating for Coastal Properties

In an era where climate change is intensifying the frequency and severity of storms and hurricanes, especially in coastal regions, understanding and quantifying the associated risks is critical.

According to the National Geographic Society, a storm surge is a rise in sea level that occurs during tropical cyclones, which are intense storms also known as typhoons or hurricanes.

The storms produce strong winds that push the water into shore which can lead to flooding and pose a real threat in coastal regions.

To help understand these risks, a Storm Surge and Hurricane Risk Rating score can provide property owners, developers, real estate agents, insurers, urban planners, local governments, buyers and investors with a clear picture of a property’s vulnerability to these natural disasters.

These stakeholders will be conducting their own necessary research, and a risk rating system can offer an indicative metric to guide their decisions.

Why is a Storm Surge and Hurricane Risk Rating Important?

Understanding storm surge and hurricane risks is crucial for building a resilient society.

Natural catastrophes pose significant challenges, and quantifying these risks can aid in better preparation and prompt responses.

Strengthening homes and incentivising homeowners to invest in property fortification can reduce potential losses. Accurate risk assessments and reliable data can allow insurers to offer discounts for mitigation actions, enhance home resale values, and reveal the increased costs to mortgage issuers due to natural disasters.

Achieving resilience relies on expert understanding of the real estate ecosystem and the benefits of informed mitigation strategies.

Steps to build a Storm Surge and Hurricane Risk Rating

1. Defining scoring criteria and scale

The foundation of a risk rating system is a clear and understandable scale, such as 1 to 10, with each number representing a different level of risk.

Establishing specific criteria for assessment is also essential for a well-rounded evaluation.

2. Key factors to consider

Several factors contribute significantly to a property’s risk from storm surges and hurricanes:

Proximity to coast

 

  • Proximity to Coastline: The closer a property is to the coastline, the higher the risk of storm surge impacts.
  • Elevation and Topography: Properties at higher elevations or with certain topographical features may have reduced risk.
  • Historical Data: Analysing past hurricane and storm surge incidents from historical weather databases and local government records can provide critical insights into potential future risks.
  • Local Climate Trends: Understanding the local weather patterns can help predict the likelihood of storms.
Natural barriers
  • Flood Zone Designation: Properties in designated flood zones face a heightened risk. Flood risk information is generally available from Local Councils.
  • Building Design and Materials: Construction that is designed to be resilient against high winds and flooding can mitigate risk.
  • Infrastructure and Preparedness: Robust local infrastructure and emergency plans can play a vital role in risk reduction.
  • Natural Barriers: The presence of natural features, such as dunes or wetlands that can absorb storm impacts, reduces risk.
  • Regional Planning: Effective community and regional planning and zoning can mitigate potential damage. Consult local zoning laws and development plans for more property-specific.

3. Assigning weights to each factor

Assigning appropriate weights to each of the above factors based on its impact on overall risk ensures that the score accurately reflects the property’s vulnerability.

Use expert consultations and statistical analysis to determine appropriate weights, and adjust weights based on real-world data and expert feedback.

4. Data collection and analysis

Gathering and analysing data, including GIS mapping, climate records and historical event data, is crucial to assigning accurate sub-scores for each criterion. Cross-referencing multiple sources will ensure data accuracy and statistical software can be used for thorough analysis.

5. Calculating the overall score

By aggregating these sub-scores, considering their respective weights, we arrive at a comprehensive risk rating for each property. Using a formula or algorithm will ensure consistency in calculations. Further validating the scoring system with sample properties will help improve accuracy.

6. Validation and adjustment

It’s vital to validate and adjust the rating system against historical data and expert analysis to ensure its reliability and accuracy. Regularly review and update the criteria and weights based on new data.

Checklist

7. Providing risk mitigation recommendations

Along with the risk score, offering advice on how to reduce a property’s vulnerability to storm surges and hurricanes can be highly beneficial. Suggestions such as upgrading building materials, improving drainage systems or investing in flood barriers can form a checklist of actionable steps to reduce a property’s vulnerability.

8. Regular updates and re-evaluations

Continuously updating the risk rating system to reflect environmental changes, infrastructure developments and updated data is crucial. This includes regular reviews, incorporating new data and tech advancements can improve the risk rating system. 

Building Resilience with Accurate Risk Ratings

Stakeholders can create a robust and reliable risk rating system that enhances safety and preparedness in coastal areas.

A well-developed Storm Surge and Hurricane Risk Rating can provide essential information for making educated decisions about property development, insurance and risk management.

As the world grapples with the increasing challenges of climate change, these tools become ever more critical in our collective efforts to build resilient communities.

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Environmental Risks in Real Estate: Essential Metrics for Assessment

Environmental Risks in Real Estate: Essential Metrics for Assessment

Driven by greater awareness and demand, environmental considerations are increasingly at the forefront of property development and investment.

Environmental factors can significantly impact site selection, regulatory compliance, property values, safety, infrastructure, sustainability, insurance costs, and the overall desirability of real estate.

To adequately build resilient properties for our future, understanding and assessing environmental risks in real estate is crucial.

Examining the key metrics and statistics used to measure these risks can also provide valuable insights for property stakeholders who are building climate intelligence as a means of value creation and strategic differentiation in the real estate industry.

On the other hand, the real estate industry contributes approximately 39% of total global emissions. This highlights how factors as broad as the choice of building materials, construction methods, real estate planning and development can influence and help to mitigate global climate change and environmental risk.

Environmental assessment metrics provide important intel to stakeholders and businesses in and around the real estate industry. 

Here we examine the top 16 key metrics used in assessing environmental risk in real estate.

1. Flood Risk Assessment

Managing flood risk is an important aspect of adapting to global climate change and flood risk assessments have become an important part of risk management practices. The estimation of risk is somewhat challenging and involves careful consideration of a number of varying factors such as location, historical flood data, and elevation.

Flood risk is a concern, especially for properties near water bodies.

Flood

2. Earthquake Risk Score

In earthquake-prone areas, earthquake risk score is vital. It evaluates the probability of earthquakes and their potential impact, factoring in seismic activity and building standards.

Earthquake risk metrics can support stakeholders in developing risk reduction measures such as emergency response plans, building design codes, or insurance-related decisions.

3. Wildfire Risk Rating

Properties in or near wilderness areas must consider the risk of wildfires. This rating looks at location, vegetation, and climate conditions. There are a number of data and solutions in the market that help decision makers with deeper location intelligence insights, such as CoreLogic with their climate risk solutions and Precisely with their wildfire risk data.

Then there are those protech innovators who actively incorporate environmental risks into their solutions, such as Nearmap who’ve recently acquired BetterView, will also be integrating risk ratings for data decisions given the ever-changing nature of bush fires, floods, and other disasters.

4. Storm Surge and Tsunami Risk

While storm surges and tsunamis are caused by different events, they both have the potential to cause significant harm and damage, such as substantial erosion of beaches and coastal highways, and waves pose a threat to boats and buildings along the shoreline. As the surging waters move inland, rivers and lakes may experience adverse effects, contributing to the escalation of flood levels.

Coastal properties are evaluated for their vulnerability to storm surge and tsunamis, crucial in today’s changing climate.

Sea levels

5. Sea Level Rise Projections

With climate change, assessing the long-term risk of sea level rise is essential for coastal real estate investments.

Climate Central’s Coastal Risk Screening Tool is a handy tool for quick future projections.

6. Air Quality Index (AQI)

Air pollution stands as the most significant environmental threat to global public health, resulting in an approximate annual total of 7 million premature deaths.

AQI impacts property desirability and occupant health, making it a significant factor in urban and industrial areas.

7. Soil Contamination Levels

Soil contamination can limit property use and affect value, necessitating thorough assessments.

Australian soil information is collected by government and held by the states and territories. Soil Science Australia, the national soil science body, shares a handy list of Soils Data, Maps and Information Sources for reference.

Soil

8. Water Quality Assessments

Our water systems, including surface and groundwater, catchments, as well as estuarine and marine bodies, constitute intricate ecological networks that we engage with daily. These waterways and wetlands play an important role in:

  • Providing drinking water
  • Supporting irrigation and agriculture
  • Receiving and purifying effluent and stormwater
  • Facilitating recreational and commercial activities such as fishing and boating.

The quality of local water sources is a key consideration, as it affects usability and desirability

9. Heat Island Effect

Urban areas influence the surrounding atmosphere and engage with climate processes, resulting in distinct microclimates within cities.

This heat island phenomenon leads to urban areas experiencing notably higher temperatures compared to their surroundings, particularly in areas with limited green cover and increased hard surfaces that absorb, retain, and emit heat.

Urban heat islands can increase energy costs and affect living conditions, and is an important factor in urban planning.

10. Noise Pollution Levels

The World Health Organization (WHO) recognises noise pollution—defined as unfavorable noise caused by human activity—as an underestimated threat that can cause a number of short- and long-term health problems.

As well as contributing to health, noise pollution is often seen as a less-than-desirable attribute contributing to liveability.

Properties exposed to high noise levels from traffic or industry can affect their value.

11. Environmental Regulation Compliance

In Australia, compliance with legislation including protection of threatened plants, animals and ecosystems, wildlife trade, hazardous waste, air quality and monitoring compliance with the conditions of approvals granted under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act) is conducted by The Department of Climate Change, Energy, the Environment and Water.

Compliance with environmental regulations is critical to avoid legal issues and maintain property value.

Soil erosion

12. Land Stability and Erosion Rates

Land stability and erosion rates is affected by soils, surface cover, topography, and climate; all of which are interrelated.

Particularly in areas with unstable soils or steep terrain, assessing the risk of landslides or erosion is essential for many aspects of real estate such as site selection, development planning and insurance, while these risks can also have an influence on property valuations.

13. Proximity to Hazardous Facilities

Numerous research studies have indicated a correlation between living in close proximity to sites with hazardous wastes, industrial facilities, pesticide-treated cropland, busy roadways, nuclear power plants, and gas stations or repair shops, result in an increased likelihood of detrimental health effects.

Government may form regulations and implement procedures for permits and enforcement to limit pollution.

As such, properties in close proximity may face increased regulations, risks or insurance costs.

14. Biodiversity and Wildlife Protection Areas

With a sustained need for housing, urban planners and conservation managers are consistently exploring alternative strategies for residential development that aim to reduce adverse effects on biodiversity and ecosystem functioning.

Thus, proximity to protected areas can limit development options and affect property value.

Biodiversity

15. Carbon Footprint Analysis

Climate change is already underway, with an escalating impact that is increasingly affecting all of us around the globe.

Without immediate and systemic action to address its destructive consequences, the impact is expected to be substantial.

For greater visibility into the environmental footprint of transactions and impacts of our consumption and production activities, organisations such as FootprintLab provide current, credible and commercially ready carbon data. This information can aid consumers, producers and governments in decision-making that aligns with their sustainability goals.

Managing carbon emissions from the construction industry is one crucial step in limiting these effects on climate change and a property’s carbon footprint is becoming a significant factor in light of global climate concerns.

16. Sustainability Certifications

A green building certification is a verification process ensuring that a building is designed and constructed to enhance energy efficiency, decrease water usage, foster a healthier indoor environment, manage resources and waste effectively, and limit environmental impact.

The process generally requires adherence to specific guidelines and criteria, often assessed by an accredited third-party organisation, leading to the certification of the building.

There are different green building certifications around the globe, with LEED in the United States, BREEAM in the United Kingdom and NABERS in Australia, each with its own set of criteria and scoring systems.

Properties with these certifications are often seen as less risky and more desirable.

The Proptech Cloud’s Environment and Energy Efficiency Data provides energy supply data and NABERS energy rating data to guide decisions on energy sourcing as part of a robust sustainability strategy.

Managing Environmental Risks

Understanding and mitigating environmental risks is important in the real estate sector. By using these metrics, stakeholders can make informed decisions, adapt to environmental challenges, uncover business opportunities and invest in sustainable and resilient properties.

As the world continues to focus on environmental sustainability, these considerations will become increasingly integral to real estate assessment and development.

Subscribe to our newsletter

Subscribe to receive the latest blogs and data listings direct to your inbox.

Read more blogs from The Proptech Cloud

Crafting a Storm Surge and Hurricane Risk Rating for Coastal Properties

A high-level approach to developing a storm surge and hurricane risk rating system to guide stakeholders with a vested interest in coastal properties.

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