After Grand Canyon flash flood: Parks service, Approximately 15 people may be missing

Corroborated by 2 sources from 2 publishers

globaltech4h ago

TL;DR

The Hill Energy & Environment

https://thehill.com/homenews/state-watch/6060286-grand-canyon-flash-floods-missing

The New York Times

https://www.nytimes.com/2026/08/30/us/grand-canyon-flash-flood-people-missing.html