What to Know About Hiking in Areas Prone to Flash Floods NYT > Top Stories By: Ryley Ober 31 August 2026 at 23:15 Canyons, small streams and dry creek beds in the West can be deceptively dangerous, trapping hikers when rainfall upstream causes rapidly rising water. Β© John Locher/Associated PressBright Angel Canyon, the site of a significant flash-flood event on Saturday.