The report finds health risks and impacts of climate change are worsening, with millions dying needlessly each year due to fossil fuel dependence, growing greenhouse gas emissions, and failure to adequately adapt to climate change.

As some countries and companies rollback on climate commitments, local and grassroots leadership is building momentum for a healthier future, from the bottom up.​

The report represents the work of 128 experts from 71 institutions, monitoring progress across 57 indicators – from heat-related deaths to bank lending to fossil fuels – providing the most comprehensive assessment yet of the links between climate change and health.

Findings on heat and health include the following:

• Heat-related deaths have risen by 63% since the 1990s, now averaging 546,000 deaths per year (2012–2021).
• Between 2020 and 2024, 84% of the heatwave days people experienced each year would not have occurred without climate change.
• 123.7 million more people are facing moderate or severe food insecurity linked to more frequent droughts and heatwaves.
• Lost labour productivity due to heat amounted to US$1.09 trillion in potential income losses in 2024, with the heaviest impacts falling on low- and medium-income countries.