Preparing to address climate change uncertainty
By Gallagher Re’s Ms Yingzhen Chuang
News from around the world and a continuing stream of scientific outputs, has almost everyone convinced that climate change has had, and will continue to have a noticeable impact on weather patterns. Intensive rainfalls and record-breaking heatwaves are now widely believed to be products of the warming earth. We have seen global temperatures rise by approximately 1.1⁰C compared with 1850-1900 (according to IPCC), and this long-term trend may continue gradually with forecasts of worsening conditions for the rest of this century. For the insurance sector, as the industry which exists to manage the financial implications of the world’s climate risks, it is an issue of critical importance, today and in the future.
A new normal?
Climate change and its associated impacts have and will continue to have, multiple implications for (re)insurance companies underwriting risk. The most obvious is that a change in climate conditions may cause an increase in volatility around the frequency and severity of weather-driven natural catastrophe events, not necessarily next year or in the immediate future, but in the longer term. A holistic approach involving realistic and properly-informed underwriting alongside positive and practical progress in climate resilience will help the insurance sector to effectively manage its risk, concentrating its resources where most appropriate, and therefore best fulfilling its role in society.
One example of such outcomes is the change in the intensity and spatial distribution of rainfall, which directly impacts flood risk. Floods in China’s Henan province in July 2021 caused economic losses of as much as $19bn, and insured losses that reached nearly $2bn, comprising more than half a million claims. The Henan floods were the costliest natural catastrophe event ever in China for insurers, but not the costliest in terms of economic losses. Similarly, following three weeks of flooding in eastern Australia earlier this year, insurers have been hit with claims in excess of $4bn, making the event the largest flood loss ever in the country.
The Australian floods followed 2019-20’s extensive and devastating bushfires there. The Australian bushfires were one of a cluster of unusual wildfires world-wide which have cost insurers billions in recent years. While floods can be considered as a primary peril in many parts of Asia, wildfires constitute a so-called ‘secondary peril’ from the perspective of insurers. But many people have begun to believe that floods, wildfires, winter freezes, and summer droughts should no longer be considered secondary. As Typhoon Hagibis in Japan recently demonstrated, the damage from flooding can be as bad or worse than the havoc wreaked by the windstorm itself. It’s a pattern that has been repeated on multiple continents.
One thing we can all agree however, is that global weather continues to change, and that the insurance sector needs to continue to react (and to be proactive) in a positive, measured, and beneficial way. We can also agree that there is no definite trend of change in long-term losses after accounting for inflation, growth in exposure and growth in insurance penetration.
A climate ‘own view of risk’
The industry is in the early stages of quantifying the impacts of the emerging climate risk. (Re)Insurers and third-party vendors have developed plenty of catastrophe models to use in the measurement of physical risks arising from weather-related perils such as major tropical cyclones. But when the parameters change because the climate is changing, or when formerly ‘secondary’ perils are intensified due to incompletely understood changes to the world’s climatic conditions, it is prudent to reassess the suitability of existing models to adequately capture the risk that is being managed.
Existing vendor models provide a useful lens to view what may be considered a baseline of physical risk under the current climate. We already work with these models in the course of clients’ renewals and are able to customise analyses to address a model’s deficiencies and a client’s assumptions and claims experience to form a client’s ‘own view of risk’. A ‘climate view of risk’ can similarly reflect a client’s approach to the emerging risk, taking care to account for climate signals already incorporated into the specific model. Based on the detailed evaluations we have undertaken to date, point to the inclusion of a climate signal in some current models for cyclone and flood for Asia-Pacific. This may manifest as the incorporation of more severe events at higher frequencies than history has shown, making existing models conservative.
Other factors may contribute toward shaping a client’s view of climate risk. Insurers typically have understood the risks they carry, in particular for peak peril exposure, and the hazards which imperil them. What is then key is for the focus to expand towards secondary perils, and how the portfolio is distributed for these perils that may not in the past have been large loss drivers. This could potentially transform the underwriting strategy to be more risk based in response to these climate-impacted perils.
These findings and strategies can then be applied to develop clients’ tailored ‘climate-change view of risk’ that does not simply rely on what tools are available, but on what is best able to capture an ‘own view of risk’. Ultimately, we arrive at a tailored ‘climate view of risk’ aligned with the client’s understanding of the materiality of climate change impacts on their business.
The narrative for renewals
Gaining improved confidence in the impact of climate risk on an individual insurer’s risk portfolio is a sophisticated exercise which on its own is not the only or the initial action that risk carriers should take to mitigate climate change risk. As reinsurance renewals approach, three key steps can be taken to showcase to reinsurers that ceding insurance companies understand climate change risk, have considered its potential impact on their portfolios, and have started taking concrete actions to mitigate that risk.
First is to gain a thorough understanding of the risk on the books. Insurers need to know in more detail than ever what’s in their portfolios, and where the vulnerabilities lie. They should begin with the insured risks themselves, to determine, for example, if they lie within a potential storm-surge zone, or flood prone area. Address details may not be enough; and if risk detail is insufficient for such analysis, insurers should set about collecting it as a priority.
The second step is to understand the hazard, which is not a straightforward exercise, because climate impacts on some hazards have not yet reached scientific consensus, let alone been properly captured in available models. Still, it is essential to at least consider how risk profiles may evolve under its influence, and to ensure appropriate analyses and assumptions are undertaken in proportion to materiality to the business.
Finally, insurers should construct narratives around the practical policies they have implemented or intend to put in place to mitigate these risks, and therefore to alleviate the impact of climate change. These policies, rooted in overall risk appetite, will be informed by what’s been learned about risks and hazards in steps one and two.
On the macro level, these actions feed into a long-term business strategy. All that shapes the narrative that companies present to their reinsurers. Good, credible stories will be rewarded with more enthusiastic buy-in and support.
Insurers need not face this challenge alone. Gallagher Re’s team of climate specialists, including the recently-appointed Steve Bowen as chief meteorologist, have gained the best possible understanding of the current and coming impacts of climate change. Working closely with the Gallagher Research Centre our experts deploy the latest analytical tools to identify and assess exposures and help insurers to manage them. We harness our first-hand global knowledge, and leverage our academic partners, to help clients remain informed of changes to evolving national climate policies, regulatory changes, and mitigation measures. Through various offices throughout the Asia-Pacific region, we are here to help our clients combat climate change uncertainty.
Ms Yingzhen Chuang is head of climate and ESG strategy and execution with Gallagher Re.