Alejandra Borunda

Alejandra Borunda reports on climate and health for NPR, treating global warming as a direct driver of physical and mental health outcomes rather than a distant environmental issue. Her coverage focuses on how heat, storms, disease and other climate shifts show up in people’s bodies and minds, and on what communities are doing to protect themselves. She brings a former climate scientist’s training and a clear, grounded style to stories that connect complex data and atmospheric science to everyday risks and choices.

Extreme heat and hidden health impacts

Heat is a central thread in Borunda’s work, and she treats it as a chronic public health threat rather than just a weather story. She led an NPR investigation that, in partnership with Boston University, modeled how many deaths in the United States are influenced by high temperatures and found that heat is contributing to thousands more deaths each year than official statistics recognize. In that project, she explained why current death records undercount heat, how medical examiners code causes of death, and what that gap means for public health planning and prevention.

She extends that focus into local reporting, such as profiling an Arizona medical examiner who is building better systems to track heat-related deaths in a region facing escalating temperatures. Her coverage of an early-season heat wave in Texas explores why unusually hot spring conditions can be especially dangerous, drawing out the physiological and community-level risks when extreme heat arrives before people and infrastructure have adjusted.

In broadcast and digital stories, including work on how hotter nights are costing people significant hours of sleep each year, she uses specific metrics like lost rest or elevated mortality to make the health stakes of rising temperatures concrete.

Climate disasters and mental health

Borunda consistently reports on the psychological toll of climate-fueled disasters, treating mental health as part of the core climate story. Her fellowship work focuses on how wildfires, hurricanes and extreme heat events are upending lives and leaving lasting emotional and mental scars in affected communities.

She has covered fires in places like Los Angeles and examined how repeated smoke, evacuations and loss reshape people’s sense of safety and well-being. Her reporting on storms such as Hurricane Helene explains how climate change has intensified rainfall and other hazards, while also looking at how communities cope with disruption, grief and long-term recovery.

Across these pieces, she treats trauma, stress and anxiety as measurable impacts alongside physical injuries or property damage, and she highlights how health systems and local networks are trying to respond.

Disease, inequity and a warming world

Beyond heat and disasters, Borunda covers how climate change is reshaping patterns of disease and amplifying existing inequities. Her work includes stories on how illnesses such as dengue fever are spreading into new regions as temperatures and precipitation patterns shift, detailing the mechanisms that allow disease-carrying mosquitoes to expand their range.

She also reports on how climate-worsened disasters and chronic exposures, like smoke or polluted air, interact with social and economic divides to produce unequal health outcomes. That focus on inequity runs back through her earlier environment reporting, where she wrote about issues such as shade and heat disparities across neighborhoods and how climate impacts, from retreating glaciers in Greenland to shrinking ice fishing seasons on the Great Lakes, fall unevenly on communities.

Across these subjects, she uses both field reporting and scientific data to show who is most at risk and why, grounding broad climate trends in specific human stories.

Climate solutions in daily life

Borunda does not limit her beat to harms; she also covers practical and science-based solutions that connect climate change to everyday choices, especially around food and land.

In a feature on the Washington State University Breadlab, she reported on efforts to develop climate-resilient, whole wheat varieties and on the lab’s mission to make whole grain breads appealing enough to shift consumer habits as part of a broader climate strategy. She uses that story and others like it to show how plant breeding, agricultural research and diet can become tools for cutting emissions and building resilience. Her past environment reporting, including work on creative responses to climate change at National Geographic, similarly highlighted community-level and technological solutions, from local adaptation projects to global scientific initiatives.

Across her solutions coverage, she maintains the same health focus, asking how policy, science and personal behavior can reduce both climate drivers and the health burdens they create.

Across these areas, Borunda’s beat is defined by an insistence that climate change is already a health story, measurable in deaths, disrupted sleep, spreading diseases and mental strain, and by a habit of pairing rigorous data and climate science with intimate reporting on people living through those changes.