Special Report: The March 2026 Western U.S. Heatwave
In March 2026, the Western U.S. heatwave generated a +11.5°F monthly anomaly, unprecedented in 170 years of instrumental observations and second only to the Dust Bowl in station-record breadth. In this Special Report, we examine the observational record, attribution, and the possible emergence of a more significant climate signal: evidence of increasing temperature variance that mean-shift models could systematically miss.
