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How the Santa Ana winds helped fuel the Los Angeles wildfires

Over 29,000 acres in the greater Los Angeles area are on fire right now. The fires emerged after the Santa Ana winds swept into the Los Angeles area Tuesday. The largest is the Palisades fire, which is quickly burning through the Pacific Palisades and Malibu communities. It's one of four ongoing critical fires — only one of which is partially contained. Ahead of the windy week, a Red Flag Warning was issued for an increased fire risk due to the strong winds, low humidity and higher temperature. Today, we dig into the Santa Ana winds: What they are and how they combined with other factors to create conditions for the most destructive fire in Los Angeles' history.

Questions, story ideas or want us to dig more into the science underpinning natural disasters? Email us at shortwave@npr.org — we'd love to hear from you!

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This episode was produced by Jessica Yung and edited by our showrunner, Rebecca Ramirez. Rebecca Ramirez checked the facts. Kwesi Lee was the audio engineer.

Copyright 2025 NPR

Emily Kwong (she/her) is the reporter for NPR's daily science podcast, Short Wave. The podcast explores new discoveries, everyday mysteries and the science behind the headlines — all in about 10 minutes, Monday through Friday.
Jessica Yung
Jessica (she/her) is a producer for the Short Wave. She got her start in radio as a producer at Gimlet's narrative technology podcast Reply All, working on stories about QAnon, video games, cryptic tweets, and more. For the past two years, she has taught podcast production to high schoolers at Harlem Children's Zone, where she guided her students through making personal pieces about topics like jumping the MTA turnstile and complicated relationships with parents. Before she came to radio, she worked in print media, through various jobs at literary magazines and book publishers.
Rebecca Ramirez (she/her) is the founding producer of NPR's daily science podcast, Short Wave. It's a meditation in how to be a Swiss Army Knife, in that it involves a little of everything — background research, finding and booking sources, interviewing guests, writing, cutting the tape, editing, scoring ... you get the idea.
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