Last mentioned: Mar 20, 2026
Scientific Warning
Climatologists issue a formal briefing on the 'parade of ultra extremes' and its long-term implications.
Temperature Records Shattered
Phoenix and Las Vegas record their hottest March days in history, exceeding 95°F.
Heat Dome Formation
A high-pressure system begins to stall over the Southwest, trapping warm air.
Snowpack Peak
Regional snowpack levels peak early due to unseasonably warm February rains.
An unprecedented early-season heatwave across the Southwest United States has scientists sounding the alarm over a 'parade of ultra extremes.' This event underscores the accelerating impact of climate change as regional temperature records are shattered months before the traditional peak of summer.