After a sudden rainstorm, flash floods hit the Bright Angel Canyon and Phantom Ranch area in the Grand Canyon, leaving more than 20 hikers missing.

According to the National Park Service (NPS), 62 people have already been airlifted out of the water‑affected zones, and no injuries have been reported to date.

The NPS warned that despite the current relief, thunderstorms and heavy rainfall are forecasted for Sunday and Monday, which could trigger additional flash flooding, debris flows, rockfall and abrupt changes to trail and river conditions.

Trails in the impacted sectors, including the popular Bright Angel Trail, have been closed until assessments are completed. The NPS is calling on hikers, backpackers and local residents who may have been in the area on Saturday to come forward with any information that could help locate missing visitors.

The Grand Canyon is the United States’ most visited national park, drawing around five million tourists annually. The Bright Angel Trail is a favorite among hikers, and safety measures are being reinforced as the park recovers from the storm.