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Climate Crisis: 63% Surge in Heat-Related Deaths Since 1990

11/5/2025

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Summary

Story summary

The 2025 Lancet Countdown reports a 63% rise in heat-related deaths since the 1990s.
The report says climate change caused 16 life-threatening heatwave days per year from 2020 to 2024.
In low HDI countries, heat-related deaths reached 1.73% of total deaths, versus 0.53% in high-HDI countries.
In 2024, heat-driven sleep loss rose 9%, the decade’s highest.
Dr. Githinji Gitahi emphasizes the human cost of climate change and urges immediate action.

History

Historical Context

The 1992 Earth Summit in Rio de Janeiro established the United Nations Framework Convention on Climate Change, aiming to address global warming. Since then, heat-related deaths have surged by 63%, particularly affecting low Human Development Index countries. A recent Lancet report underscores the urgent need for action, as climate change exacerbates health crises, threatening global health systems and increasing mortality rates.

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Story summary

The 2025 Lancet Countdown reports a 63% rise in heat-related deaths since the 1990s.
The report says climate change caused 16 life-threatening heatwave days per year from 2020 to 2024.
In low HDI countries, heat-related deaths reached 1.73% of total deaths, versus 0.53% in high-HDI countries.
In 2024, heat-driven sleep loss rose 9%, the decade’s highest.
Dr. Githinji Gitahi emphasizes the human cost of climate change and urges immediate action.

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