The climate-health nexus refers to the interconnected relationship between climate change and human health, where shifts in the Earth’s climate affect physical, mental and social well-being. This concept acknowledges that the planet’s climate is intrinsically linked to human health and societal well-being.
Climate change impacts, such as extreme weather events, altered precipitation patterns and rising temperatures, can exacerbate existing health risks and create new ones. Extreme events like heat waves, floods, and wildfires can cause injuries, heatstroke and asthma attacks, and can force people to leave their homes. Climate change also disrupts the systems we rely on for clean water, safe food, and stable housing. For example, droughts can lead to food shortages and malnutrition, while heavier rains can spread waterborne diseases.
Scientists and policy organizations like the United Nations use the word “nexus” to describe the complex, reciprocal connection between big global issues like climate and health, because solving one often means addressing the other. Understanding this link helps researchers and policymakers work together more effectively toward a healthy, resilient future.