Caleb is a Climate and Human Health Fellow working with the Center for Climate, Health, and the Global Environment at Harvard T.H. Chan School of Public Health (Harvard Chan C-CHANGE) to understand and enhance approaches to health risks during and after extreme weather events.

Caleb’s current work focuses on the means to address health needs during and after climate-related disasters. He is currently exploring the hazards posed by extreme heat events and weather-related electrical outages for patients in communities near Boston, including the threat that these can pose to patients with specific medical vulnerabilities. He is also examining the long-term health impacts of hurricanes and other climate-related disasters, including issues of prolonged loss of access to medical services and temporary and permanent migration of affected populations.

Caleb has experience with bench, clinical, and operational research in a variety of settings, is former Uganda Program Director for the nonprofit Global Emergency Care, and recently completed his residency in Emergency Medicine at Beth Israel Deaconess Medical Center. He is currently a practicing Emergency Medicine physician with Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center.

Caleb received his BS from Cornell University and his MD from the University of Massachusetts Medical School. He is a graduate of the Harvard Affiliated Emergency Medicine Residency at Beth Israel Deaconess Medical Center and is currently enrolled in the Master of Public Health program at the Harvard T. H. Chan School of Public Health.

Contact information and a list of Caleb’s published work is available on the Harvard Catalyst at

Man in a facemask sits on a bus while it pours outside

Climate change or COVID-19: Which is a greater threat to our health?

"Rather than focus on comparing the scale of these catastrophes, we should heed the lessons of our experience with COVID-19 as we face a changing climate and future pandemics," says Dr. Caleb Dresser.

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A group of people gather in a school gym serving as a hurricane shelter

National Shelter System Data: Opportunities, Challenges, and Applications to COVID-19

Our Climate and Health Fellow Caleb Dresser draws from available shelter and mobility data to detail how sheltering practices after disasters in the United States in 2020 have greatly differed from similar disasters in previous years.

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Houses destroyed by Typhoon Haiyan

At the Intersection of Human Migration and Climate Change: New Article Puts Out Call to Action

In a new article published in Current Environmental Health Reports this week, Dr. Caleb Dresser and others examine the complexities at the intersection of human migration and climate change.

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Woman in grass

Staying healthy in times of climate crisis

A conversation with our fellow Caleb Dresser on the medical community's approach to health risks during and after extreme weather events.

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