'Health is the face of climate change': how can cities mitigate the impact of global warming

Key Concepts

• COP 30 (30th session of the UN Framework Convention on Climate Change)
• Paris Accord
• 1.5° C warming limit
• Climate change impacts on health
• Heat-related deaths
• Wildfire smoke
• Fossil fuel emissions
• Health system adaptation
• Cool Cities Accelerator
• Pre-COP conference
• C40 Cities
• Heat-related mortality
• Universal health coverage
• Productivity loss due to heat
• Climate risks in vulnerable nations

COP 30 and the Urgency of Climate Action on Health

The upcoming COP 30, the 30th session of the UN Framework Convention on Climate Change, is set to take place in Brazil. This event is drawing significant attention as warnings intensify that the Paris Accord's goal of limiting global warming to 1.5° C above pre-industrial levels (from 1850 onwards) may not be met. The consequences of exceeding this limit are far-reaching, impacting polar ice caps and the overall health of the planet.

Escalating Health Risks from Climate Change

The transcript highlights the direct and worsening impact of climate change on human health. According to the 2025 Lancet Countdown report on health and climate change, climate risks to health and well-being are at record high levels. This is exacerbated by a global trend of "backtracking on the necessary climate actions and on previous commitments that would have protected people's health and people's wellbeing."

Key Statistics from the Lancet Countdown Report:

• Heat-related deaths: Increased by 23% since the 1990s, reaching 546,000 annually.
• Wildfire smoke: Linked to a record 154,000 deaths in 2024.
• Fossil fuel burning: Causes an estimated 2.5 million deaths per year.

These figures underscore the critical need for leaders at COP 30 to implement meaningful actions to mitigate these escalating health consequences.

The Need for Global Efforts and Health System Adaptation

Experts are calling for well-articulated global efforts to address these challenges. This includes:

• Adapting to climate change: Developing strategies to cope with the changing climate.
• Strengthening health systems: Enhancing the capacity of health systems to respond to climate-related threats, such as infectious disease transmission and other adverse health impacts. This requires funding, knowledge sharing, and international cooperation.

Billionaire philanthropist Bill Gates has also emphasized the importance of centering human welfare at COP 30, advocating for a focus on improving health and agriculture in vulnerable nations.

Local Action and the Cool Cities Accelerator

The pre-COP conference in Rio de Janeiro, Brazil, brought together local leaders, including city mayors, to discuss climate action on the road to COP 30. Amelia Carrera, Director of the Health Initiative at the Rockefeller Foundation, highlighted the significance of this event.

Key Expectations for COP 30:

• Agreement on indicators for climate and health, such as those related to heat-related mortality and universal health coverage.
• A shift from pledges to concrete actions.

Carrera discussed the Cool Cities Accelerator, an initiative involving 33 cities and their mayors. This program commits cities to implementing health-related heat targets and other heat mitigation strategies.

Cool Cities Accelerator Components:

• Short-term actions: Implementing early warning systems for heat, improving understanding of heat-related work, and addressing governance issues around heat.
• Long-term actions: Rethinking and redesigning urban environments to reduce heat island effects and create more livable cities.

Climate Change Impacts Beyond Health: Productivity and Vulnerable Regions

The discussion extended to the broader impacts of heat, particularly in regions like Africa. Amelia Carrera noted that extreme heat not only affects health but also significantly impacts productivity, forcing people to stop working. The Lancet Countdown report estimated the number of lost work hours due to excessive heat in the past year.

The conversation also touched upon the compounded challenges faced by vulnerable nations, such as those in Africa and the Caribbean, where climate impacts like heat and extreme weather events are exacerbated by factors like reduced foreign aid. Despite these challenges, there is a growing commitment from local leaders at state and city levels to respond to climate risks. Cities are often on the front lines, experiencing these needs more directly and responding more effectively.

Hopes for COP 30: Health as the Face of Climate Change

Amelia Carrera expressed her hopes for COP 30, emphasizing the crucial role of agreeing on global indicators for climate and health. She believes that keeping health at the forefront of climate discussions is vital, as "health is the face of climate change." By making health the most tangible way to explain the impact of extreme weather events on people's lives and livelihoods, the COP can advance its agenda.

The transcript concludes by reiterating the importance of COP 30 and the growing recognition of the interconnectedness of health, heat, and climate change.