U.S. Southwest
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‘Hot Drought’ Unprecedented Across Western North America Since the 16th Century, Study Suggests
Increased heat due to human-induced climate change, not just lack of rain, is driving the continued drying of soils, say researchers.
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Study Reveals Long-Distance Levers Behind U.S. Southwest Drought—and a Dry Future
The U.S. Southwest has suffered a historic drought over the past two decades. A new study elucidates the drivers, and says conditions will never return to those of the relatively wet 20th century.
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Warming Pushes Western U.S. Toward Driest Period in 1,000 Years
Study Warns of Unprecedented Risk of Drought in 21st Century
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Smaller Colorado River Projected for Coming Decades, Study Says
Some 40 million people depend on the Colorado River Basin for water but warmer weather from rising greenhouse gas levels and a growing population may signal water shortages ahead.
COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More
