working paper

Mainstreaming Climate Adaptation

Planning and Action into Health Systems in Fiji, Ghana, and Benin

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3. Climate Change and Human Health: A Growing Sense of Urgency

3.1 Climate Change and Other Shocks Are Already Impacting People’s Health and Health Systems

The COVID-19 pandemic has made clear that health systems around the world must be made more resilient to a range of potential shocks. Among these shocks is climate change, which poses a grave threat to human lives and to global public health, putting already-burdened health care systems—especially in low-income countries—under even greater stress. People living in poverty, whether in the Global South or in wealthier countries like the United States, in many cases still lack adequate access to basic health services. Without support and funding, vulnerable groups of people like the elderly, the sick and chronically ill, children, women, and other marginalized groups—all vulnerable for different reasons—will continue to suffer the most from the impacts of climate change on health (WHO 2018a; Ebi et al. 2019). For example, women and girls are more likely to suffer from climate-related food insecurity and poor mental health compared with men and boys (Dunne 2020).

Health-related risks due to the effects of climate change range from increased likelihood of transmitting vector-borne diseases (like malaria and dengue) and water-borne illnesses, to decreased air quality, as seen in Figure 2 (WHO 2018a; Ebi et al. 2019). The World Health Organization (WHO) estimates that one-sixth of illness and disability suffered globally is due to vector-borne diseases (Campbell-Lendrum et al. 2015). Climate change is redistributing and increasing the optimal habitats for mosquitoes and other pathogens that carry disease—in some cases, bringing infectious diseases into communities that had not encountered them before—and causing epidemics, and overall heightening suffering and countries’ burdens of disease (Caminade et al. 2019).

Similarly, hotter temperatures and extreme events (like stronger cyclones and landslides) can cause physical injuries, water contamination, decreased labor productivity, and mental stress. When climate change negatively impacts crop yields and quality, this in turn can lead to greater food insecurity and undernutrition (especially affecting child growth and development; Ebi et al. 2019). Climate change is also linked to migration due to environmental degradation, natural resources instability, and conflict. This can expose people to physical and mental health stressors, exacerbate existing health issues, and lead to poorer living conditions and reduced access to affordable medical care. Climate events can also impair or damage critical health infrastructure systems, making it harder for citizens to access health services.

The rising frequency, intensity, and duration of extreme weather events (e.g., violent storms, droughts, and floods) will disproportionately impact the physical and economic capacities of people and households already struggling with weakened health and chronic disease (e.g., cardiovascular, cerebrovascular, and respiratory diseases). Slow-onset effects of climate change like increasing water stress, decreasing crop yields, and poorer crop nutritional quality also affect health and are predicted to worsen existing health problems (HRC 2018; IPCC 2014). The World Health Organization conservatively projects an additional 250,000 deaths per year between 2030 and 2050 due to the global burden of climate change, and also recognizes its effects on the health of hundreds of millions more (WHO 2018a). Every day spent in ill health contributes to heightened mortality and morbidity, increasing countries’ disease burdens. The importance of being prepared and able to respond to crises in an agile and inclusive manner to protect lives, livelihoods, and property cannot be overstated.

Figure 2 | The Many and Varied Health Risks Associated with Climate Change Impacts

Notes: This infographic is meant to illustrate the main linkages between climate and health and is not exhaustive. Please note that social equities and Disability Adjusted Life Years (DALYs), representing years of life spent in states of less than full health or with disability, can be lost across all exposure pathways.

Source: Adapted from WHO 2021.

3.2 Protecting Human Health from Climate Impacts Is Imperative for Countries

The relationship between health and changing climate conditions is becoming clearer, yet progress on mainstreaming resilience into health systems has been slow, despite being urgently needed (Ebi et al. 2019). Even though human health is a priority in 57 percent of countries’ NDCs that have an adaptation component, and close to half of NDCs acknowledge the negative health impacts of climate change, only 0.5 percent of multilateral climate finance has been targeted for health (WHO 2018a; WHO 2019a). Health is a priority sector in the 20 NAPs submitted as of December 2020, covering approximately 10 percent of all adaptation actions mentioned (Savage et al. forthcoming). Many NAPs have not calculated budget requirements for health actions, though nine estimate that these would require 0.1–18.25 percent of their adaptation budgets (Savage et al. forthcoming).

Despite being a priority, health-specific projects are vastly underrepresented in countries’ requests for technical and financial support to the NDC Partnership (NDC Partnership 2020). In the case of the NDC Partnership, just over half of health-climate requests remain unsupported, highlighting a technical services gap among partners, with the WHO playing a central role in finding ways to address this lack of support (Voita and Morton 2020). Likewise, health appears in only 13.5 percent of Green Climate Fund country briefs and programs, with similar rates among its peers, making health the area that showed the greatest divergence and inconsistency between countries’ stated needs and funded activities (WRI 2018). Additional research is needed to understand why so few health-related projects are put forward; for example, countries may have difficulty translating concerns (or data) into actionable proposals and calculating what financial resources are needed.

In a global review of over 100 countries, the United Nations (UN) found that fewer than one in five countries is spending enough to implement climate-related health commitments (UN 2019). This gap will be further exacerbated by 2030, when the direct damage costs to health (excluding indirect effects) are expected to be between US $2 and $4 billion per year (WHO 2018b). Failing to protect health systems or take action to enhance their resilience can erode countries’ hard-won development gains, lead to less productive workforces, and aggravate the stress experienced by already heavily burdened health systems.

The COVID-19 pandemic, which has paralyzed entire economies and stretched health systems beyond their capacities in many locations, demonstrates how crucial it is to have robust and resilient health systems. Bridging the gap between policies and their implementation is essential for reducing losses in health systems when (not if) the next crisis arises (Ebi et al. 2019).

3.3 Mainstreaming Climate Risk Management into Health Systems Enhances Resilience

To reduce climate change risks and lower vulnerabilities, adaptation must be mainstreamed into health policies and plans. Mainstreaming is the process by which information on climate risks, hazards, and vulnerabilities is integrated into development policies, programs, plans, and projects to make them climate resilient, which often leads to improved development outcomes (Mogelgaard et al. 2018; Gupta and van der Grijp 2010; Klein et al. 2007).

Mainstreaming adaptation can lead to “no-regrets” opportunities to improve health systems now, regardless of the severity of climate impacts, and help reduce vulnerabilities to future climate and non-climate shocks (Watts et al. 2015). This will increase the likelihood of achieving development goals that are resilient to climate impacts and support the livelihoods of the most vulnerable groups of people (Ayers and Huq 2009). Examples of such actions benefiting the health system regardless of how many climate hazards materialize are many and include strengthening surveillance and response to vector-borne infectious diseases, training more medical staff, and introducing efficiency mechanisms to provide higher-quality patient care.

In 2015, the World Health Organization launched a framework to embed adaptation in health services, to be used by nongovernmental organizations (NGOs), health ministries, and funding agencies. This framework was a response to growing demand from countries for guidance on how to operationalize and effectively address climate challenges in the health sector (WHO 2015a). It consists of six reinforcing building blocks to increase climate resilience across 10 components. These blocks are leadership and governance; health workforce; health information systems; essential medical products and technologies; service delivery; and financing (WHO 2015a; see Figure 3). Despite some gaps such as clear linkages between building blocks and how to prioritize them, the framework is easy to adapt to various contexts and captures the key aspects of health systems (Yoon 2020).

The WHO has also built on the UNFCCC’s technical guidelines for drafting National Adaptation Plans to guide the development of Health-NAPs (WHO 2021). The goal of these “H-NAPs” is to strengthen and protect health systems from climate change, taking into account the biological, social, and physical determinants of health (Ebi and Villalobos Prats 2015). The H-NAP guidance outlines a systemic process by which countries can identify national goals and priority activities to build health resilience. It offers principles for cross-sectoral integration of health and climate change into national strategies, processes, and monitoring systems, and encourages pilot approaches (Ebi and Villalobos Prats 2015). A few countries have begun to develop pilots based on the guidelines. These include small island nations that are part of the Pacific Islands Action Plan on Climate Change and Health initiative (2019–2023), as well as Ethiopia through its Federal Ministry of Health’s National Health Adaptation Plan to Climate Change (2018–2020) (FMH 2018). Kiribati, Chile, and Brazil have also developed a climate change and health strategy or sectoral plan (Savage et al. forthcoming).

Figure 3 | The WHO’s Operational Framework for Building Climate Resilient Health Systems, with Six Building Blocks Supporting 10 Key Components of Health Systems

Note: WHO stands for World Health Organization.

Source: Adapted from WHO 2015a.

In addition to mainstreaming adaptation into plans and policies, the gap between planning and on-the-ground implementation must also be addressed. This implementation gap can exist due to a variety of factors. Mogelgaard et al. (2018) demonstrated that adaptation is more likely to be mainstreamed across sectors and from the national to the local level—and the implementation gap is thus more likely to be closed—if five factors work together:

  • Supportive policy frameworks
  • Leadership from within and outside the government to drive the mainstreaming process
  • Coordination mechanisms that allow actors to cooperate across sectors and government departments to attain common mainstreaming goals
  • Information, monitoring, and evaluation frameworks and tools that enable learning
  • Finances to implement action (other authors have also noted the importance of increased finance to implement climate change adaptation activities—see UNEP 2021; Lebel et al. 2012; Olhoff et al. 2016; Caravani et al. 2017)

Although limited information on the costs of adaptation action exists, recognizing and assessing the many benefits of adaptation action for the health sector can help mobilize finance. Health co-benefits are rarely reflected in current NDCs: Only 3 percent of NDCs (5 out of 184) do so (WHO 2019a). The monetary benefits of preventing climate-related health impacts can be substantial, as illustrated by one study of the economic cost-benefit ratios for heatwave early warning systems in three European cities (Hunt et al. 2016). Based on an economic model, with certain assumptions, this study found monetary benefits over a period of 50 years in Madrid ranging between €2 and €4.7 billion in savings across future climate scenarios. Similarly, Prague’s savings were calculated to range between €400 and €600 million, while preventive measures in London could lead to savings ranging from €54.6 to €154.2 billion (Hunt et al. 2016). This analysis demonstrates that the benefits of adapting to current and future climate impacts to save lives and reduce the burden on health systems can be very high and can outweigh the costs of doing so—and are therefore to be considered no- or low-regrets options. Infrastructure improvements to health facilities like hospitals and clinics to enhance resilience are expensive but also cost-effective because they minimize or avoid costly emergency repairs and reduce service interruptions when climate hazards, like hurricanes, materialize (HCWH 2011). Strengthening the overall health system and increasing access could also result in equity co-benefits by especially benefiting groups that are traditionally marginalized.

For these impressive benefits to be realized, countries must move from merely planning to mainstream adaptation into their health systems to actually implementing such actions. This paper describes how three countries—Fiji, Ghana, and Benin—have not only designed programs and plans to mainstream adaptation into their health systems but also begun to move from planning to implementation on the ground.

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