Overview
- Zion National Park reported flash flooding on Monday after intense thunderstorms produced heavy rain and high flows, the National Park Service said.
- The National Weather Service in Salt Lake City issued flash-flood warnings for the SR-9 corridor and parts of west-central Kane and east-central Washington counties as storms moved through.
- Video shared with news outlets showed water pouring over cliffs and leaving mud, rocks, and debris on park roadways, confirming localized destructive flows.
- The Zion Mount Carmel Highway was closed to east- and west-bound traffic because of rockfall and at least one tour operator canceled hikes while Springdale crews worked to clear extensive street flooding and debris.
- Officials warned that July through September monsoon storms can produce sudden canyon runoff and urged visitors to follow warnings, keep off flooded roads, and monitor park alerts and webcams as the region recovers from a recent deadly Grand Canyon flood.