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Alex Hall

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Professor and Director, UCLA Center for Climate Science, University of California, Los Angeles, University of California, Los Angeles

Firefighters battle in Pacific Palisades, Calif., on Jan. 7, 2025. David Swanson/AFP via Getty Images

August 6, 2025

Wildfire season is starting weeks earlier in California – a new study shows how climate change is driving the expansion

Gavin D. Madakumbura, University of California, Los Angeles and Alex Hall, University of California, Los Angeles

Parts of California are seeing fire season start more than 10 weeks earlier now than in the 1990s.

Hurricane Harvey dumped an unheard-of 60 inches of rain in parts of Texas in 2017. AP Photo/David J. Phillip

July 6, 2021

Global evidence links rise in extreme precipitation to human‑driven climate change

Gavin D. Madakumbura, University of California, Los Angeles; Alex Hall, University of California, Los Angeles; Chad Thackeray, University of California, Los Angeles, and Jesse Norris, University of California, Los Angeles

Scientists used artificial neural networks to analyze precipitation records. They found evidence of human activities influencing extreme rainfall or snowfall around the world.

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Location: Los Angeles, California, U.S.
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Joined August 5, 2025