
2025 Nova Media Fellow
NPR is an independent, nonprofit media organization that was founded on a mission to create a more informed public. Every day, NPR connects with millions of Americans on the air, online, and in person to explore the news, ideas, and what it means to be human. Through its network of member stations, NPR makes local stories national, national stories local, and global stories personal.

NPR’s mission is to collaborate with Member Stations to cultivate an informed public, fostering a deeper understanding and appreciation of events, ideas, and cultures. To achieve this, NPR produces, acquires, and distributes programming that upholds the highest standards of public service in journalism and cultural expression. They also advocate for their members’ shared interests and provide satellite interconnection for the entire public radio system.
In 2022, NPR launched the Climate Desk to harness the strengths of existing national and international coverage and build greater local coverage capacity across the network.
Media Fellowship Project
Measuring the human toll of climate change in the United States
Climate change is making heat waves, hurricanes, and wildfires more dangerous. But no one knows its exact human toll across the United States: there is no comprehensive count, official or unofficial, of the number of people hurt or killed each year by climate-worsened disasters.
The numbers that are collected, scientists say, are likely vast undercounts of the total health impact. And no one in the country is immune to the health risks posed by climate change. Heat is heat, and smoke doesn’t discriminate. But the costs of those risks are borne unequally—and the people being hurt most by climate change are often those least equipped to withstand them: poor people, the elderly, and communities of color.
This project aims to answer seemingly straightforward questions: How many people does climate change kill in the United States in any given year? And can a more accurate accounting of climate change’s real risks drive policies that will help keep people healthy and safe? These questions have become even more urgent as the Trump administration weakens or rolls back programs and protections intended to ameliorate climate-related risks.
NPR’s Alejandra Borunda is setting out to answer them, building on reporting that begun in 2024. Through data-drive, deeply-reported audio and digital stories, Borunda will bring into focus how and why Americans get hurt, sick, and die from climate-fueled events. She’ll home in on communities finding ways to protect people in their most vulnerable moments, and zoom out to look at how state and federal policies are helping people or failing them.
Lead Reporter

Alejandra Borunda (she/her) is a reporter on NPR’s Climate Desk, where she covers the intersection of climate change and health. She reports on how climate change is affecting people’s bodies and minds—and how people can, and are, protecting themselves and others.
Before Borunda joined NPR in 2023, she wrote about climate science and environmental issues for National Geographic, where she reported on glacier retreat in Greenland, shade and heat inequity in Los Angeles, climate change’s impact on ice fishing in the Great Lakes, and much more.
Media Fellow Publications

Hot Nights are Costing You up to 56 Hours of Sleep Per Year, Study Finds
NPR reports on new research examining how climate change and hotter nights are affecting sleep worldwide.

The Long-Term Health Impacts from the L.A. Wildfires Are Just Becoming Clear
NPR reports on continuing research evaluating longterm health effects of wildfire smoke as part of the Nova Media Fellowship.
Selected Publications
- Extreme Heat Contributed to His Brother’s Death. He Worries He Could be Next. (2024)
As Deaths Increase, How Climate Change is Making Heat More Dangerous (2024)
- Hot Weather Kills. Who Gets Protected? (2025)
- Air Pollution Still Plagues Nearly Half of Americans. That Does a Number on Our Health. (2025)
- Scientists Get Closer to Finding Out Just How Hot is Too Hot for Humans to Live (2025)





