Climate change is causing an expanding health burden, the 2026 Lancet Countdown warns in findings highlighted by the World Health Organization on 28 October. The report tracks 54 indicators and argues that the response is not keeping pace with damage from heat, drought and other climate-related risks.
The assessment links a record 710,000 deaths worldwide to heat in 2023 and attributes more than 70% of that burden to human-caused climate change. These are research estimates for 2023, not a live count of deaths in 2026 and not a total for Bulgaria.
The report also identifies progress. Clean-energy investment reached $2.1 trillion in 2025, while lower fossil-fuel-related air pollution is associated with health gains. Early warning systems and more climate-resilient health services are among the measures already helping communities prepare.
Heat affects more than comfort. It can strain people with existing illnesses, disrupt work and make reliable access to cooling, water and care more important. The risk is uneven: exposure, housing conditions and the capacity of local health services influence how well a community can respond.
The authors call for climate change to be formally addressed as a global health emergency. That call should not be confused with a new declaration of a public health emergency of international concern under the International Health Regulations. The policy argument is that prevention, cleaner energy and adaptation belong inside health planning, rather than being treated as distant environmental concerns. The test for governments is whether those priorities lead to funded, practical protection for the people most exposed.
