Heat — Upper Santa Cruz River and Altar Valleys, Arizona

2025-05-27 · Upper Santa Cruz River and Altar Valleys, Arizona

Event narrative

High temperatures in Southeastern Arizona were 1 degree below normal, causing Low HeatRisk. Nogales International Airport reached a high temperature of 91 degrees. The Pima County Medical Examiner found that the cause of death for an individual in Nogales, AZ had heat as a contributing factor to their death.

Wider weather episode

High temperatures in Southeastern Arizona were 3 to 5 degrees above normal, however overnight low temperatures were near normal, causing Low to Moderate HeatRisk. The Pima County Medical Examiner found that the cause of death for 4 individuals, one in Nogales, one in Topawa, and two in Tucson, had heat as a contributing factor to 2 of their deaths, while one was heat caused.

Source: NOAA Storm Events Database, event_id 1261919. Narrative written by the NWS forecast office that issued the report.