Unprecedented March Heat Wave Sweeps Across Western U.S.
Unprecedented March Heat Wave Sweeps Across Western U.S.
US · Published Mar 21, 2026
Record-breaking March heat wave sweeps across the Western U.S., with Phoenix reaching 105°F.
The heat wave, driven by a strong heat dome and climate change, causes temperatures to spike 20-40 degrees above average.
Over 100 record highs have been broken, impacting states from California to Wyoming, posing health and environmental risks.
Record-breaking temperatures across multiple western states
The Western United States is experiencing an unprecedented March heat wave, with temperatures shattering records across multiple states. Phoenix, Arizona, reached 105°F, surpassing its previous March record, and a temporary station near Martinez Lake, Arizona, recorded 110°F, potentially setting a new national March record. This extreme weather is driven by a strong heat dome, exacerbated by climate change, causing temperatures to spike 20 to 40 degrees above average.
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