84% of world’s fastest growing cities face ‘extreme’ climate change risks
What do 84% of the world’s fastest growing cities have in common? Rapid growth, rising temperatures and increasingly severe weather events brought on by climate change are putting companies and investments at risk.
Combining new UN projections on rates of annual population growth in over 1800 cities with subnational data from our Climate Change Vulnerability Index (CCVI), we assess the threat from climate change over the next 30 years. We found that of the 100 fastest growing cities by population, 84 are rated ‘extreme risk’, with a further 14 in the ‘high risk’ category.
Europe is a safe zone
Over 95% of the 234 cities considered ‘extreme risk’ in the CCVI are in Africa and Asia, compounding fears that the world’s poorest countries are set to pay the highest price of climate change. The scale of the risk could threaten the capital flows that have streamed into these markets to take advantage of burgeoning economies, emerging consumers and cheap labour.
At the other end of the spectrum, 86% of the 292 ‘low risk’ cities are located in Europe and the Americas. The five cities considered most insulated from the impacts of climate change in the CCVI, Glasgow, Belfast, Edinburgh, Preston and Middlesbrough, are all located in the UK.
Rapidly growing African cities most vulnerable to impacts of climate change
Source: Verisk Maplecroft 2018; United Nations 2018
African/Asian cities on the climate front line
Urban centres in Africa dominate in terms of population growth, with 86 of the 100 fastest growing cities. Significantly, 79 of these are rated ‘extreme risk’ in the CCVI, including 15 African capitals and many of the continent’s key commercial hubs. Among the most at risk are: Kampala in Uganda, where the annual population is set to grow by 5.1% a year on average between 2018-35; Dar-es-Salaam in Tanzania (4.8%), Abuja (4.5%) and Lagos (3.5%) in Nigeria; Addis Ababa (4.3%) in Ethiopia; and Luanda (3.7%) in Angola.
The relationship between climate change vulnerability and rates of population growth is strong. The highest risk cities already lack adequate healthcare services and disaster mitigation systems and have highly vulnerable populations. The strain on essential services will intensify as populations continue to rise.
Using the latest IMF projections, we estimate future exposure of urban GDP under the CCVI to illustrate the levels of financial risk. The 10 cities rated ‘extreme risk’ in the CCVI with the highest economic exposure to climate change in 2023 include the largest commercial centres of some of the world’s key emerging markets: Jakarta, Indonesia – US$233bn; Manila, Philippines – US$166bn; Lagos, Nigeria – US$128.5bn; Baghdad, Iraq – US$88bn; and Addis Ababa, Ethiopia – US$69bn.
At the national level, the International Monetary Fund estimates that 8 of the top 10 fastest growing economies between 2018 and 2023 will be African countries. As the full effects of climate change unfold, companies investing in these markets could face a set of costly risks. The amount of GDP in African countries exposed to ‘extreme risk’ in the CCVI will grow from US$895bn in 2018 to US$1397bn in 2023.
This represents 48% of the entire continent’s GDP.
Damage to infrastructure, property and assets caused by tropical cyclones or flooding are among the more obvious impacts, but the potential disruption caused by the secondary threats of disease and increases in crime and civil unrest are not to be ignored. Drought, crop failure and instability brought on by climate change may also compound the risks by driving even larger numbers of people towards cities through cross-border and rural migration.
“Businesses operating in megacities have to understand the physical risks in the short, medium and long- term,” states Richard Hewston, Principal Climate Change and Environment Analyst. “They must work to build their resilience to climate shocks, not only to protect their assets and people, but also to satisfy investors that are increasingly factoring climate risk into their investment process.”
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