Denise Chow

Denise Chow is a science reporter at NBC News covering the environment, climate change and space. Her coverage is distinguished by a persistent focus on extreme heat and the ways climate change affects human health, using straightforward explanations of the underlying science. She links large‑scale climate trends to immediate, lived impacts, whether in daily routines, major events or travel.

Extreme heat and human health

Extreme heat and its toll on people sit at the center of Chow’s reporting.

She covers how rising temperatures translate into heat stress, health risks and changing working and living conditions, returning to this theme across breaking news and explanatory pieces. Her work examines who is most exposed to dangerous heat, how communities and public agencies respond, and what mitigation measures actually reach people on the ground.

In stories such as her report on storms, floods and scorching heat gripping the United States during a peak period of World Cup and holiday travel, she connects meteorology and climate science with how people move, gather and plan, showing heat as a practical constraint on everyday life and major events alike. Throughout, she keeps technical detail secondary to clear descriptions of risk and consequence, making climate‑driven health pressures legible to a general audience.

Extreme weather, sea-level rise and a changing coast

Beyond heat, Chow’s environment coverage follows extreme weather and sea‑level rise as they reshape communities and landscapes. Her work has focused on climate‑driven storms, flooding and other hazards, often tracing a line from long‑term warming to short‑term disruptions. She reports on sea‑level rise as a slow‑moving but concrete threat, treating it as a coastal planning and infrastructure problem rather than an abstract projection.

In 2019, she traveled to Greenland as part of a climate change special that aired across flagship NBC News programs, bringing on‑the‑ground reporting about ice loss and global sea‑level implications into the network’s broader coverage. That combination of field reporting and data‑driven explanation marks a recurring approach: she situates local events within global climate dynamics while keeping the focus on what is changing for people in specific places.

Her stories frequently highlight the gap between the pace of physical change and the speed of policy or adaptation, showing climate disruption as an ongoing process rather than a distant scenario.

Wildfire smoke and air quality

Chow also reports closely on wildfire smoke and its cross‑border impacts on air quality. She has covered episodes in which smoke from large fires travels hundreds or thousands of miles, blanketing wide swaths of the United States and forcing rapid shifts in public‑health guidance.

Her pieces chart how changing fire regimes, fueled by climate conditions, translate into recurrent air‑quality crises, especially in regions unaccustomed to prolonged smoke exposure. She pays particular attention to respiratory risks, the strain on vulnerable populations and the uneven ability of households and workplaces to adapt to prolonged poor air.

In interviews and reported segments, she brings together atmospheric scientists, health experts and affected residents to show wildfire smoke as both a climate story and a public‑health story, not just a spectacle of distant flames.

Space, astronomy and the science behind climate

Chow’s beat extends beyond Earth’s surface into space and astronomy, and that breadth shapes how she covers the environment. At NBC News she writes about NASA, the commercial space industry and new discoveries in astronomy, maintaining an active space and general science portfolio alongside her climate work. Before joining NBC News, she spent several years as a space reporter at specialist science outlets, where she wrote about rocket launches, NASA’s final space shuttle missions and major spaceflight milestones.

That background gives her climate coverage a strong scientific frame: she is comfortable working with satellite observations, planetary science and orbital technology, and she often presents environmental change as part of a larger Earth‑system narrative rather than as isolated weather events. Her stories tend to rely on expert sources from research institutions and agencies, and she uses those interviews to keep explanations tightly anchored to current science while avoiding jargon.

The result is environment reporting that consistently bridges everyday impacts with the technical tools used to understand them, from climate models to space‑based measurements.

Across these strands, Chow’s work sits at the intersection of breaking news, climate reporting and accessible science journalism.

She writes in a direct, descriptive style that foregrounds observed change - heat waves, floods, smoke, rising seas - while tying those events back to longer‑term climate drivers. Her dual focus on human health and scientific detail distinguishes her from more policy‑centric environment coverage: public‑health implications and the lived experience of extreme conditions are central, but the mechanisms behind them are always explained.

For stories that touch climate, extreme weather or the scientific understanding of environmental risks, she approaches the subject as both a news reporter and a science explainer, keeping the climate crisis grounded in specific, observable realities.