WORLDglobal
Early-season heatwave intensifies across western United States, Extreme Heat Warnings issued
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Updated 2 hours ago
First seen March 18, 2026 19:37:12Stay on top of this story
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Quick Summary
An anomalously early-season heatwave intensified across the western United States on March 18, 2026, with Extreme Heat Warnings in effect for parts of the Desert Southwest and temperatures forecast to expand east into the Rockies and Great Plains by March 20. Highs are expected to reach 40–44°C (104–112°F) in the hottest desert regions, with numerous daily and some monthly March records likely to be broken. Source