Climate Change Is Becoming a Public Health Crisis Across the Caribbean

Climate change is increasingly becoming a public health challenge across the Caribbean, where extreme heat, hurricanes, flooding, drought and rising seas are threatening not only lives and livelihoods but also the health systems communities depend on during emergencies.

A new regional research agenda on climate change and health warns that the effects extend well beyond injuries and deaths caused directly by extreme weather.

Climate-related hazards can disrupt hospitals and clinics, affect access to safe water and food, displace communities and alter conditions that influence the spread of infectious diseases.

The Research for Action Agenda on Climate Change and Health in the Caribbean, published by the Pan American Health Organization and developed with regional and academic partners, identifies 18 priority areas for research and action.

Together, they illustrate how closely climate and health have become connected across Caribbean states.

More than a weather problem

Caribbean Small Island Developing States are particularly exposed to climate-related health risks.

Much of the region's population, infrastructure and economic activity is concentrated close to coastlines, while small economies and limited human and financial resources can make recovery from major disasters particularly difficult.

A powerful hurricane can therefore create several health emergencies at once.

Beyond deaths and injuries, damage to hospitals can interrupt treatment, flooding can contaminate water supplies, electricity failures can affect medical equipment and medicine storage, and displacement can make it harder for people with existing illnesses to access care.

Extreme heat creates another layer of risk.

Higher temperatures can contribute directly to heat-related illness while placing additional pressure on people living with cardiovascular, respiratory and other noncommunicable diseases.

Children, older people, low-income households, outdoor workers and people already living with chronic illnesses can face particularly high risks.

Climate change is also changing disease risk

The research agenda highlights vector-borne diseases as another major area of concern.

Diseases such as dengue are already a significant public health challenge across much of the Caribbean.

Temperature, rainfall and humidity can influence mosquito populations and disease transmission, meaning changing climatic conditions can alter when and where outbreaks become more likely.

That makes stronger surveillance increasingly important.

Researchers are calling for better links between climate information and public-health monitoring so authorities can identify changing risks earlier and develop more effective warning systems.

But disease surveillance is only one part of the challenge.

The agenda also identifies water and sanitation, air quality, food security, mental health, population displacement and climate-related inequality among the areas requiring greater attention.

Can hospitals withstand the next disaster?

Climate resilience also depends on whether health facilities themselves remain operational during extreme weather.

Hospitals and clinics are often expected to become the centre of disaster response precisely when their buildings, electricity supplies, water systems, staff and transport links are under pressure.

The research agenda therefore calls for greater investment in resilient and sustainable health infrastructure.

This can include strengthening facilities against extreme weather, improving backup energy and water supplies, protecting medical equipment and ensuring that essential health services can continue during emergencies.

Building resilience before disaster strikes can determine whether a health system is able to respond when demand suddenly increases.

Eighteen priorities, one regional challenge

The Caribbean research agenda groups its 18 priorities into four broad areas.

The first examines climate-related health impacts, exposure and vulnerability, including extreme weather, heat-related illness, vector-borne diseases, water and sanitation, mental health, air quality, displacement and questions of equity.

The second focuses on adaptation and health-system resilience, including stronger cooperation between agencies, improved research and surveillance, food security and greater climate-health knowledge among professionals and communities.

A third area looks at climate mitigation and the health benefits that can accompany lower-emission development, including sustainable infrastructure and smarter healthcare facilities.

The final area addresses the resources needed to turn plans into action, particularly financing and stronger government engagement on climate and health.

Taken together, the priorities show that climate-related health risks cannot be managed by health ministries alone.

Meteorological agencies, disaster-management authorities, environmental departments, researchers, local governments and communities all hold information and resources needed to understand and reduce risk.

The data gap

One of the major challenges identified across the region is the availability of consistent climate and health data.

Without strong surveillance systems, governments may struggle to establish how heat, extreme weather or changing environmental conditions are affecting disease and mortality.

Data gaps can also make it more difficult to identify the communities facing the greatest risks, evaluate whether adaptation programmes are working or make a strong case for international climate and health financing.

The agenda therefore calls for greater investment in research, monitoring and information-sharing across Caribbean countries.

It also highlights the need for a more climate-literate health workforce capable of recognising how environmental changes influence the conditions they encounter in clinics and communities.

From research to action

The research agenda arrives as Caribbean governments are placing greater emphasis on the connection between climate policy and public health.

The central challenge now is turning that knowledge into functioning systems: hospitals that remain operational during hurricanes, surveillance capable of detecting changing disease patterns, early warnings that reach vulnerable communities and financing that allows countries to invest before disasters occur.

Climate change in the Caribbean is no longer only an environmental issue measured through sea levels, temperatures or hurricane intensity.

It is increasingly measured in disrupted healthcare, unsafe water, disease risk, heat exposure and the ability of health systems to continue protecting people as environmental conditions change.

For Caribbean countries, preparing for a warmer future will therefore also mean preparing their public-health systems for risks that are becoming more interconnected.