Approximately 15 People May Be Missing After Grand Canyon Flash Flood: Parks Service A deluge of rain poured into the Grand Canyon, triggering a deadly flash flood that swept through the Colorado River.
The National Park Service has confirmed that approximately 15 people may be missing after being caught off guard by the sudden torrent. The Grand Canyon's unique terrain and meteorology created a deadly combination.
Heavy rainfall, exacerbated by the canyon's steep walls and narrow channels, can quickly build up force.