December 3, 2020 – Four Twenty Seven Report. More frequent and severe extreme events driven by climate change pose a significant threat to nations around the world and understanding who and what is exposed to climate hazards is essential to pricing this risk and preparing for its impacts. This new report and underlying analytics assess sovereign exposure to floods, heat stress, hurricanes and typhoons, sea level rise, wildfires, and water stress based on the only known global dataset matching physical climate risk exposure to locations of population, GDP (Purchasing Power Parity) and agricultural areas within countries.
Read the full report.
Globally, increasingly severe climate conditions impose growing pressure on populations and economies. The implications on economic growth, welfare, production, labor, and productivity are large, with potential material impacts on sovereign credit risk. However, assessing sovereign climate risk presents significant challenges. While most approaches to quantifying future climate risk exposure for sovereigns measure the average exposure over the entire territory of a country, this doesn’t capture whether the populated or economically productive areas are exposed to extremes. Likewise, averages of exposures to several climate hazards can mask extreme exposure to a particular hazard in a certain area of a country.
We’ve mapped the co-occurrence of hazards and exposures, explicitly factoring in the spatial heterogeneity of both climate hazards and people and economic activities across a country. This new report, Measuring What Matters – A New Approach to Assessing Sovereign Climate Risk, provides an analysis of the data. We find that all nations face meaningful risks despite their variation in size and resources. Explore sovereign climate risk in the interactive map below, based on both total and percent of a nation’s population, GDP (PPP) and agricultural areas exposed to climate hazards in 2040.
- By 2040, we project the number of people exposed to damaging floods will rise from 2.2 billion to 3.6 billion people, or from 28% to 41% of the global population. Roughly $78 trillion, equivalent to about 57% of the world’s current GDP, will be exposed to flooding.
- Over 25% of the world’s population in 2040 could be in areas where the frequency and severity of hot days far exceeds local historical extremes, with negative implications for human health, labor productivity, and agriculture. In some areas of Latin America, climate change will expose 80-100% of agriculture to increased heat stress in 2040
- By 2040, we estimate over a third of today’s agricultural area will be subject to high water stress. In Africa, over 125 million people and over 35 million hectares of agriculture will be exposed to increased water stress, threatening regional food security.
- By 2040, nearly a third of the world’s population may live in areas where the meteorological conditions and vegetative fuel availability would allow for wildfires to spread if ignited.
- Over half of the population in the most exposed small island developing nations are exposed to either cyclones or coastal flooding amplified by sea level rise. In the United States and China alone, over $10 trillion worth of GDP (PPP) is exposed to hurricanes and typhoons.
Read the full report.
Read the press release.
Contact us to learn more about accessing this unique dataset or explore our other physical climate risk data for banks and investors.
*Erratum: In Table 1 of a previous version of this report the “Agriculture Area at High Risk” column was said to be in units of 1 billion hectares. However, it is in units of 100 million hectares.
Climate change will expose the airport sector to increased physical climate risks within the next two decades. In its report, US airports face growing climate risks, but business model and resiliency investments mitigate impact, Moody’s Investors Service leverages Four Twenty Seven’s physical climate risk data to explore potential damages from increased exposure of US airports to floods, heat stress, hurricanes, sea level rise and wildfires.
The report found that in 2004-2019, an average 37% of delayed flights annually resulted from climate-related extreme weather events. Airports along coastlines or rivers face particular risks as floods can damage crucial structures such as runways and terminals leading to significant costs or rendering the assets unusable. Likewise hurricanes can cause widespread damage including economic impacts on broader regions. Heat stress and wildfire smoke can both present challenges for planes taking off or landing, leading to delayed or canceled flights or adjusted cargo loads.
Airports often undertake long-term capital intensive projects and integrating resilience measures into planning these investments will be critical. Liquidity will also help absorb the effect of disruptive climate-related events.
Moody’s subscribers can read the full report here.
To learn more about Four Twenty Seven’s climate risk data, check out our solutions for investors, banks and corporations or read our report on.
This joint report provides a comprehensive analysis of the ways in which climate risks affect sovereign risk, demonstrating new empirical evidence of how climate risk and resilience influence the costs of capital. It also explores the implications for Southeast Asia in particular, where countries are highly exposed to climate change risks and their economic consequences. Lastly, the report outlines five policy recommendations based on these findings. The report was a collaboration between the Centre for Sustainable Finance at SOAS University of London, the Asian Development Bank Institute, the World Wide Fund for Nature Singapore and Four Twenty Seven.
Download the full report.
Download the Executive Summary.
Watch the launch event.
“Climate Change and Sovereign Risk” outlines six transmission channels through which climate change affects sovereign risk and in turn the cost of capital, providing examples of each and explaining how they’re connected. It uses empirical analysis to demonstrate the significant impacts of climate risk exposure on the cost of capital. Using a sample of 40 developed and emerging economies, econometric analysis shows that higher climate risk vulnerability leads to significant rises in the cost of sovereign borrowing. Premia on sovereign bond yields amount to around 275 basis points for economies highly exposed to climate risk. This risk premium is estimated at 113 basis points for emerging market economies overall, and 155 basis points for Southeast Asian economies.
To further explore these channels, the report provides a closer look at Southeast Asia, a region with significant exposure to climate hazards such as storms, floods, sea level rise, heat waves and water stress. Physical risks are expected to considerably affect economic activity, international commerce, employment and public finances across Southeast Asian countries. Transition risks will be prominent as exports and economies become affected by international climate policies, technological change and shifting consumption patterns. The implications of climate change for macrofinancial stability and sovereign risk are likely to be material for most if not all countries in Southeast Asia.
The report highlights the need for governments to climate-proof their economies and public finances or potentially face an ever-worsening spiral of climate vulnerability and unsustainable debt burdens. It outlines five policy recommendations, emphasizing the importance for financial authorities to integrate climate risk into their risk management processes and for governments to prioritize comprehensive climate vulnerability assessments and work with the financial sector to promote investment in climate adaptation.
The report was originally posted by SOAS University of London.
Climate change is driving more frequent coastal flooding, which threatens infrastructure, real estate and economies. In its report, Sea Level Rise Increases Credit Risk for Coastal States and Local Governments, Moody’s Investors Service leverages Four Twenty Seven’s climate risk data to explore the credit risks of sea level rise for coastal governments.
The analysis highlights several areas with particular exposure to increasing sea level rise, which threatens property value growth and associate tax revenue, in turn increasing credit risk. Increased disruption due to coastal flooding disrupts the local economies that rely on coastal economic activities to generate revenue. Likewise, areas less exposed to flooding are prone to climate gentrification, as property values increase when these areas become more desirable and residents can be displaced. Though it can be expensive, effective, equitable adaptation measures can reduce vulnerability to sea level rise and support credit-quality. This requires tax revenue, financial capacity, and growth strategies that aim to protect vulnerable local economies and property values.
Coastal economies across the U.S. are exposed to the impacts of sea level rise. However coordinated adaptation efforts between federal, state and local governments can reduce risks. Areas such as Gulf Coast states lag in state-level adaptation policies, causing local governments to shoulder the financial burden of sea level rise, and straining their credit quality. Federal government leadership and increased funding is key in supporting adaptation measures that mitigate the impacts of sea level risks in coastal areas.
Moody’s subscribers can read the full report here.
To learn more about Four Twenty Seven’s climate risk data, check out our solutions for investors, banks and corporations or read our analysis on the impacts of sea level rise on real estate.