Heatwave scorching US west ‘virtually impossible’ without climate crisis, say scientists - The Guardian

The Guardian
March 20, 2026
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3 min read

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The Bottom Line

Scientists say current Western U.S. heatwave would be virtually impossible without human-caused climate change.

How This Affects You

Extreme heat increases risk of heat-related illness, wildfires, and power grid strain in Western states.

AI Summary

Scientists have attributed an ongoing heatwave scorching the U.S. West to human-caused climate change, stating the extreme temperatures would be virtually impossible without the climate crisis. The assessment reflects a growing scientific consensus that rising global temperatures are intensifying heat events across the region, making previously rare weather patterns more frequent and severe. Heatwaves of this magnitude pose direct threats to public health, strain power grids, and increase wildfire risk across western states. The attribution underscores the accelerating connection between greenhouse gas emissions and extreme weather, a relationship climate researchers have increasingly documented through rapid-response studies in recent years.

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