Overview

• The National Weather Service in Phoenix issued a Flash Flood Warning until 8 p.m. PDT for Riverside County and north‑central Imperial County, with radar estimating 0.5 to 2 inches of rain and life‑threatening flooding possible.
• NWS Las Vegas also warned San Bernardino County on Saturday afternoon near Highway 62 east of Twentynine Palms, where 0.5 to 1 inch had fallen and flash flooding was ongoing or imminent.
• Named threat areas included Niland and communities around the Salton Sea, with impacts noted along CA‑111 and drainages such as Iris Wash.
• Separate flood advisories and a flood watch covered parts of Riverside and San Bernardino Counties through the afternoon and early evening as additional downpours developed.
• The FAA instituted ground stops and significant delays in Phoenix and Las Vegas, and officials emphasized safety guidance including “Turn around, don’t drown,” while noting the event had not reached a rare flash flood emergency designation.