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Climate change is a major risk to good development outcomes, and the World Bank Group is committed to playing an important role in helping countries integrate climate action into their core development agendas. The World Bank Group (WBG) and the Asian Development Bank (ADB) are committed to supporting client countries to invest in and build a low-carbon, climate-resilient future, helping them to be better prepared to adapt to current and future climate impacts.

Sri Lanka faces moderate disaster risk levels, ranked 97th out of 191 countries by the 2019 INFORM Risk Index30 (Table 4). Sri Lanka has moderate exposure to flooding (ranked 56th), including riverine and flash flooding. Sri Lanka also has some exposure to tropical cyclones and their associated hazards (ranked 45th). Drought exposure is slightly lower (ranked 76th). Sri Lanka’s overall ranking on the INFORM risk index is somewhat mitigated by its comparatively high coping capacity score. Landslide hazard is present in many parts of Sri Lanka, but is not explicitly captured by the INFORM risk index. The section which follows analyzes climate change influences on the exposure component of risk in Sri Lanka. As seen in Figure 1, the ND-GAIN Index presents an overall picture of a country’s vulnerability and capacity to improve its resilience. In contrast,the Inform Risk Index identifies specific risks across a country to support decisions on prevention, preparedness,response and a country’s overall risk management.

Image: (Left) annual mean temperature, and (right) annual mean rainfall (mm) in Sri Lanka over the period 1901–2019.


  • Temperature rise in Sri Lanka is projected to be marginally lower than the global average. Under the highest emissions pathway (RCP8.5) temperatures are projected to rise by 2.9°C–3.5°C by the 2090s, over the 1986–2005 baseline. In contrast, warming of 0.8°C–1.2°C is projected over the same time horizon on the lowest emissions pathway (RCP2.6).
  • Rises in minimum temperatures are projected to be faster than rises in average temperatures.
  • Sri Lanka faces significant threat from extreme heat, with the number of days surpassing 35°C, potentially rising from a baseline of 20 days to more than 100 days by the 2090s, under emissions pathway RCP8.5.
  • Extreme heat threatens human health and living standards, particularly for outdoor laborers in urban areas without adequate cooling systems; this will particularly impact communities in Sri Lanka’s northern region. There is also potential for adverse implications to Sri Lanka’s large tourism sector.
  • Temperature rise is likely to put downward pressure on agricultural yields, including key staples such as rice. This may impact negatively on national and household food security.
  • Without adaptative action, the projected increase in the frequency and intensity of extreme precipitation events may put lives, livelihoods, and infrastructure at risk through their link with riverine flooding, flash floods, and landslides.
  • Increased incidence of flooding also brings the potential for enhanced disease transmission, an area demanding further research and disaster risk reduction efforts.
  • Projected changes are expected to impact on Sri Lanka’s poorest and most marginalized communities most strongly, exacerbating poverty and inequality.


Sri Lanka’s high temperatures, unique and complex hydrological regime, and exposure to extreme climate events make it highly vulnerable to climate change. In 2012, the Ministry of Environment submitted its Second National Communication to the UNFCCC (NC2), which highlights key vulnerabilities in the agriculture and water resources sectors, as well as significant risks to human health and in coastal zones. These key climate-related risks were again emphasized in Sri Lanka’s Nationally Determined Contribution (NDC) submitted after it signed and ratified the Paris Climate Agreement in 2016. Sri Lanka’s NDC outlines the country’s commitment to addressing its vulnerability to climate change in line with its commitments to a low carbon pathway through sustainable development efforts.

This document aims to succinctly summarize the climate risks faced by Sri Lanka. This includes rapid onset and long-term changes in key climate parameters, as well as impacts of these changes on communities, livelihoods, and economies, many of which are already underway. This is a high-level synthesis of existing research and analyses, focusing on the geographic domain of Sri Lanka, therefore, potentially excluding some international influences and localized impacts. The core data is sourced from the database sitting behind the World Bank Group’s Climate Change Knowledge Portal (CCKP), incorporating climate projections from the Coupled Model Inter-comparison Project Phase 5 (CMIP5). This document is primarily meant for WBG and ADB staff to inform their climate actions and to direct them to many useful sources of secondary data and research.

Due to a combination of political, geographic, and social factors, Sri Lanka is recognized as vulnerable to climate change impacts, ranked 100th out of 181 countries in the 2017 ND-GAIN Index. The ND-GAIN Index ranks 181 countries using a score which calculates a country’s vulnerability to climate change and other global challenges as well as their readiness to improve resilience. The more vulnerable a country is, the lower their score, while the more ready a country is to improve its resilience, the higher it will be. Norway has the highest score and is ranked 1st. Figure 1 is a time-series plot of the ND-GAIN Index showing Sri Lanka’s progress.

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Chandana Sesath Jayakody

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