Excessive Heat — San Bernardino County-upper Colorado River Valley, California

2025-08-20 to 2025-08-23 · San Bernardino County-upper Colorado River Valley, California

Event narrative

Extreme Heat Warning criteria were reached on four straight days.

Wider weather episode

High pressure building in from the east pushed temperatures to dangerous levels.

Source: NOAA Storm Events Database, event_id 1293198. Narrative written by the NWS forecast office that issued the report.