Event Brief
Extreme Heat Warnings Issued for Southwest US
Filed: Mar 21, 2026 at 4:04 PM ET
Summary: California and Arizona face extreme heat warnings as summerlike weather reaches Nebraska just a day into spring.
WHO: National Weather Service
WHAT: Extreme heat warnings
WHEN: Mar 21, 2026 at 3:00 PM ET
WHERE: California
WHY: Weather conditions leading to extreme heat
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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