This article was originally published here (opens in a new tab) by the C40 Knowledge Hub. It is part of a new report Agenda for a Green and Just Recovery set out by leading mayors and a complementary set of policy briefs written by C40 for cities beginning their recovery phases which can be found here (opens in a new tab).


Cities are facing the triple threat of Covid-19, climate change and economic recession. (opens in a new tab) Some are already responding to climate-related hazards alongside local outbreaks of the virus, and with the pandemic likely to be with us for the foreseeable future, more cities will inevitably follow.

The Covid-19 crisis has exposed the lack of resilience in our cities and the dearth of preparedness for major events (opens in a new tab) of governments and public health systems the world over. With the early impacts of climate change already with us – 98% of C40 cities have already experienced climate change-related events that jeopardise their economic and social prosperity – it is critical that resilience-building against climate change and future pandemics be a priority of post-Covid recovery packages, to protect our societies and our economies.

This article outlines how cities can adapt strategies to reduce risk during the pandemic, in accordance with physical-distancing requirements and other new norms, and enhance public health, climate and economic resilience for the long term through Covid-19 recovery packages.

Responding to climate risk during the pandemic

The risks posed by climate change and climate hazards have not stopped during the pandemic. Already, Covid-19 is interacting with cities’ protocols and capacity for keeping people safe from extreme heat and other events.

Conversely, these hazards risk exacerbating the effects of the pandemic. Floods and the scarcity of clean water, for example, lead to inadequate sanitation, increasing the risk of community transmission of Covid-19. With 2020 set to be one of the hottest years on record (opens in a new tab), this is likely to place extra stress on hospitals and health centres as the incidence of heat-related illness rises.

In May, Bangladesh and India faced the challenge of evacuating people from the path of Cyclone Amphan (opens in a new tab), the first super-cyclone to form in the Bay of Bengal since 1999, in the midst of local Covid-19 outbreaks.

Covid-19 has exacerbated and exposed the vulnerability of cities, their residents and essential supply chains, and demonstrated the high cost of being ill-prepared

In June, El Salvador, Guatemala and Mexico faced a similar dual challenge during Tropical Storm Cristobal, which also caused severe flooding in New Orleans (opens in a new tab) and other cities across the US state of Louisiana. The National Oceanic and Atmospheric Administration predicts a record-breaking hurricane season (opens in a new tab) due to unusually warm water temperatures in the Atlantic and the Caribbean.

As we live through the Covid-19 pandemic, cities need to adapt strategies to mitigate risk from natural hazards to accommodate physical-distancing requirements and new norms, such as the increased time that many people are spending at home.

In particular, cities should:

Residents of informal settlements face higher risks

Communities living in densely populated informal settlements have been disproportionately affected by the virus. These communities are already facing interlocking health crises (opens in a new tab), as the settlements are often located in areas of intense air pollution, exacerbated by indoor cooking with biomass fuels, with limited access to fresh water and toilets. Upgrading informal settlements to reduce Covid risk and strengthen cities’ recovery (opens in a new tab) looks at how cities can reduce risks from Covid-19 and support residents of informal settlements now and for the longer-term.

The dual challenge of Covid-19 and Cyclone Amphan

In May, Bangladesh and India were hit by Cyclone Amphan (opens in a new tab), which flooded and devastated Kolkata and killed more than 100 people in the two countries, mostly in India. In Bangladesh, early-warning systems enabled the country to prepare an additional 10,500 emergency shelters to accommodate physical distancing, helping to safely evacuate millions of people. Masks, soap and sanitiser were distributed across coastal areas by a network of 70,000 cyclone preparedness volunteers.

There is a solid economic case for climate-proofing critical infrastructure, with a significant volume of research demonstrating high cost-benefit ratios

In both countries, some people resisted calls to evacuate ahead of Cyclone Amphan out of fear of being stuck in enclosed spaces with thousands of others during Covid-19 outbreaks; this is thought to have contributed to the death toll. In India, with the attention of government, media and citizens heavily focussed on Covid-19, evacuation efforts began too late and the fear of catching the virus in crowded shelters drove many people away.

Reducing risk from climate change and future pandemics

Covid-19 has exacerbated and exposed the vulnerability of cities, their residents and essential supply chains, and demonstrated the high cost of being ill-prepared. It is critical that stimulus packages are designed to build long-term climate and pandemic resilience (opens in a new tab). This will help to create jobs now (opens in a new tab) and to ensure that cities are prepared for future risks, saving money and protecting jobs in the longer term. For example, in the United States, every $1 invested in disaster resilience saves an average of $6 in future recovery costs (opens in a new tab).

Investments to boost climate, health and economic resilience should prioritise critical infrastructure and services, and the needs of the most vulnerable populations.

  • Invest in public health services and emergency services. During emergency response periods, cities around the world have found creative ways to temporarily boost healthcare capacity, for example, by seconding medically trained staff from closed airports to the local Covid-19 response or using stadiums and other closed facilities as temporary hospitals and isolation centres. Read Protecting and expanding the healthcare workforce (opens in a new tab) and Meeting demand for PPE, hospital beds and other equipment (opens in a new tab) for more. By channelling recovery funds to bolster public health systems, to provide more hospital and healthcare spaces, equipment, digital infrastructure and trained health workers, cities can better manage the Covid-19 pandemic (opens in a new tab), as well as future pandemics, climate risks and health more broadly. By providing healthcare training and expanding the healthcare workforce, cities can also reduce unemployment and mitigate the socioeconomic impact of the pandemic.

  • Invest in water and sanitation. This provides the foundations for improved public health, reducing exposure to and transmission of Covid-19, as well as more common diseases and those associated with increased flooding, such as malaria. Investing in water and sanitation not only builds more resilient communities, but can also boost local economies. For example, in Antananarivo, investments in water access, sanitation and hygiene – such as the construction of water kiosks, fixing pipe leaks and clearing drains – created jobs, increased profits and wages, yielding benefits worth US $2 million (opens in a new tab).

  • Climate-proof critical infrastructure and new investments made to stimulate economies after Covid-19 outbreaks. Climate-proofing infrastructure and taking into account the interdependency (opens in a new tab) of infrastructure and services will improve the city resilience and reduce disruption and losses from future climate or extreme weather events. There is a solid economic case for climate-proofing critical infrastructure, with a significant volume of research demonstrating high cost-benefit ratios. For instance, actions to protect, elevate and relocate wastewater infrastructure, such as waste pipes and sewage treatment plants, in the United States has seen returns of up to $31 for every $1 invested (opens in a new tab). Climate-proofing and maintaining infrastructure will also create local jobs, particularly in the construction sector. In addition to climate-proofing existing infrastructure, it is critical that investments made in clean energy, buildings, transport, waste and other key sectors as part of Covid-19 stimulus packages are adapted for the city’s current and future climate. See Reducing climate impacts on urban sectors (opens in a new tab) for a series of short, sectoral briefs on how cities can adapt investments in buildings (including private, municipal and new buildings), walking and cycling, mass transit, clean energy, waste systems and food systems to the climate impacts they face.

  • Invest in nature-based solutions. Preserving or restoring natural areas in cities provides essential ecosystem services and effective, cheap protection against floods, drought, extreme heat and storms, and the risks of vector- and water-borne disease. Mangrove forests alone save more than $80 billion a year by preventing losses from coastal flooding, protecting 18 million people (opens in a new tab). There is a significant body of evidence (opens in a new tab) demonstrating that the economic return on investment in green infrastructure and nature-based solutions is greater than that on traditional "grey" engineered infrastructure. Green spaces have also proved critical during the pandemic to help facilitate physical distancing, provide safe spaces for outdoor physical exercise and play, and to support people’s mental health. They are a core component of the "15-minute city" (opens in a new tab), a hyper-local approach to urban development that aims to enable everyone to meet their basic needs within a short walk or bike ride from home. Investments in green infrastructure and to expand green space also generate fast, local job growth. Worker training requirements are relatively low and projects can be launched quickly.

    • Pakistan’s green stimulus scheme is prioritising employment opportunities for women and for labourers who are out of work due to the pandemic in its massive, five-year tree-planting scheme. The scheme was granted an exemption from lockdown closures and has created more than 60,000 jobs for of out-of-work labourers (opens in a new tab), planting billions of trees across the country to reduce risks from flooding, heat and other climate-related threats.

    • Paris has committed to increasing tree cover and public green space by creating small parks in school playgrounds, which would be open to the public outside of school hours, and converting car parking spaces. These measures are part of the city’s 15-minute city strategy, a key pillar of Mayor Anne Hidalgo’s successful re-election campaign in June 2020.

  • Invest in early-warning systems. Early-warning systems are critical for protecting lives and avoiding critical disaster situations. Just 24 hours warning of a storm or heatwave can cut the ensuing damage by 30% and spending $800 million on these early-warning systems (opens in a new tab) in developing countries would avoid losses of $3–16 billion per year.

(Picture credit: Unsplash)


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