2026 Report

Tracking the Links between Climate and Health

Enter the latest Lancet Countdown evidence through five connected areas, a lead article on the key findings and indicator-level data.

DirectoryVisual summary

Indicators
54
Authors
146
Collaborating institutions
71
Evidence areas
5

Explore Five Evidence Areas

Welcome to the Lancet Countdown on Health and Climate Change data explorer. This platform allows users to engage with our findings and explore the latest global report data at country, regional and income group level. The data visualisations are free to use and share, and we encourage you to include them in your work.

The Key Findings Shaping This Year’s Assessment

Evidence area 01

Health Hazards & Impacts

Tracks how climate hazards and changing environmental conditions affect health and wellbeing.

  • 1.1.5

    Heat-related mortality

    In 2023, heat was associated with a record-high 710,000 estimated deaths globally, with 71% of this burden attributed to climate change.

  • 1.2.2

    Drought

    Extreme drought affected more than half (51.8%) of the world’s land for at least a month in 2025, the second-highest level on record, and is increasing 704% faster than a decade ago.

  • 1.1.3

    Change in labour capacity

    In 2025, heat exposure led to the loss of 573 billion potential work hours, the second highest level on record, and a 35% increase from the 2006–15 annual average.

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Evidence area 02

Adaptation & Resilience

Examines how health systems, cities and countries prepare for and respond to climate-related risks.

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Evidence area 03

Mitigation & Co-Benefits

Assesses how action across energy, transport, food and other systems can protect health.

  • 3.1.2

    Household energy use

    Households in Low-HDI countries still depend heavily on biomass (88%), while electricity accounts for only 5% of Low HDI household energy, compared with 29% globally.

  • 3.2.2

    Household air pollution

    Deaths attributable to household air pollution from solid fuel use declined from 2.4 million in 2016 to 2.0 million in 2023, across the 65 countries studied

  • 3.5.1

    Healthcare Sector Emissions and Damages

    41 countries have decreased their healthcare GHG emission since 2016 due to national and international efforts. In more than half these countries reductions were as a result of more resource-efficient healthcare operations and/or decarbonising energy systems and supply chains.

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Evidence area 04

Economics & Finance

Follows the economic costs of climate change and the financial choices shaping a healthier future.

  • 4.2.2

    Compatibility of fossil fuel company strategies with the Paris agreement

    The strategies of the 100 largest oil and gas companies, as of March 2026, put them on track to exceed their share of production consistent with 1.5°C of heating by 150% by 2040, up from 138% projected in March 2025

  • 4.3.1

    Clean energy investment

    Global clean energy investment grew by 7.2% in 2025, reaching a record US$2.10 trillion and exceeding fossil fuel investment by 82%.

  • 4.3.4

    Health Research Funding

    Climate-related health research funding has increased 655% between 2016 and 2024 (rising from 0.13% to 1.5%), from US$42 million to US$316 million. The increase was particularly marked since 2020, increasing by 308% from US$77 million.

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Evidence area 05

Public & Political Engagement

Tracks how individuals, institutions and decision-makers engage with climate change and health.

  • 5.5

    Legislative Engagement

    Climate laws referencing health increased by fifty times between 2000 and 2025, with a sharp rise after 2016.

  • 5.1

    Media engagement

    There has been a 3.6% increase in climate change articles mentioning health between 2021 and 2025, with newspapers in Low- and Medium HDI countries having highest coverage

  • 5.3.2

    Scientific engagement on the health impacts of climate change

    The number of articles linking health impacts to temperature or precipitation changes attributable to human-driven climate change reached a record high of 3,400 in 2025, surpassing the previous peak in 2023 by 19%

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Call to Action: Six Global Priorities for a Health-Centred Response

Evidence in this report informs urgent priorities to change course and protect the health and survival of present and future generations.

  1. A man picking ripe tomatoes into a crate.

    Recognise, prepare for, and respond to the health emergencies of climate change through established WHO and UN mechanisms; and develop a new WHO instrument to formally recognise and address climate change as a global health emergency.

    Recognise, prepare for, and respond to the health emergencies of climate change through established WHO and broader UN mechanisms, and develop a new WHO instrument to formally recognise and address climate change as a global health emergency. Utilise the WHO Emergency Response Framework, the International Health Regulations and the Inter-Agency Standing Committee instruments to recognise, prevent, prepare for, and respond to the health and broader impacts of health emergencies driven by climate change, including by grading climate change-related emergency events and coordinating a cross-sectoral response that aligns surveillance and early warning systems with anticipatory action, health system preparedness, rapid and effective response that safeguards health systems and resource mobilisation. In addition, respond to the scientific evidence, including within this report, demonstrating that climate change is increasingly fuelling health emergencies, and that addressing their root cause requires coordinated, multisectoral and international  mitigation and adaptation actions. To do so, establish a new WHO instrument to formally recognise and address climate change as a global health emergency with multiple linked impacts, enabling a coordinated international response that enables sustained anticipatory and preventative action, cross-sectoral and coordinated emergency management, and sustained resource mobilisation.

  2. A woman preparing coconuts at a market in Cape Verde.

    Align global governance and international systems around climate change and health as a top priority.

    Align global governance and international systems around climate change and health as a top priority, and optimise the deployment of international resources to address it. Addressing climate change-related health risks requires coordinated and urgent adaptation and mitigation responses across sectors. Countries have the opportunity to build on the UN80 Initiative and the upcoming post-2030 agenda to deliver a new international governance architecture that enables and prioritises a coordinated, cross-sectoral, international response to climate change and health, thereby optimising the use of resources, maximising cost savings, breaking down silos, and ensuring that interventions deliver mutually reinforcing benefits across all sectors.

  3. Trams and people on a busy Helsinki street.

    Prioritise and promote the urgent, just, and equitable reduction of greenhouse gas emissions as a global health imperative.

    Prioritise and promote the urgent, just, and equitable reduction of greenhouse gas emissions as a global health imperative. Develop global and national roadmaps to deliver a just and healthy reduction of GHG emissions, including through a just transition away from polluting fuels (biomass and fossil fuels). Ensure these roadmaps account for, quantify, and maximise the health benefits from reduced air pollution, improved access to safe reliable and affordable energy, healthier diets, improved equity and more active lifestyles, while avoiding the health harms from extractive industries and overreliance on technologies which perpetuate the use of fossil fuels or introduce new health harms. Engage health professionals and organisations in the design and implementation of these roadmaps.

  4. Women at a fresh orange juice stall in a market square.

    Make health and wellbeing improvements as core objectives and key measures of success across all climate action

    Put health at the centre of climate action by placing present and future mortality reduction, health and wellbeing as core objectives and key measures of success across all climate action. Do this by integrating health outcomes into the target-setting, monitoring and evaluation of climate change interventions across UN programmes, the post-2030 agenda, and national policies, including climate finance allocation, and the planning, monitoring and implementation of climate action across sectors. This will help ensure that climate policies deliver and maximise their potential benefits for people and the planet on which their health depends, while identifying and avoiding unintended health harms from the transition.

  5. An older man on a hire bicycle, seen from above.

    Establish a global climate change and health data commons as a global public good.

    Establish a global climate change and health data commons as critical public infrastructure and a global public good. The commons would improve the availability, interoperability, and integration of climate and health data disaggregated by relevant population groups and at high temporal and geographical resolution. This would support the development of climate change and health surveillance and health early warning systems; facilitate knowledge sharing to strengthen countries’ capacity to collect, manage, and share data; and help bridge critical data gaps. By providing a shared evidence base, the commons would strengthen the ability of countries to develop cohesive, effective, and evidence-informed responses that protect health from the impacts of climate change.

  6. Two people sitting on a railing overlooking a dense city.

    Increase the provision of grant-based and highly concessional climate change and health finance, and meet international obligations

    Increase the provision of grant-based and highly concessional finance for climate change and health interventions, including by meeting international obligations including Article 9.1 of the Paris Agreement and the International Court of Justice Advisory Opinion on the Obligations of States in Respect of Climate Change to support equitable climate action that protects and promotes health. Such finance is needed at a scale sufficient to enable implementation of adaptation and mitigation actions without exacerbating debt burdens through additional borrowing and interest repayments. Strengthening the availability of accessible, predictable, and equitable finance is essential to addressing the shared risks of climate change, reducing global inequities, and protecting the health and wellbeing of people in all countries.

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