Authorities at Zion National Park are searching for a person who went missing after flash flooding Friday, the park said Saturday morning.

Iconic sections of the park have been closed, including The Narrows — an imposing gorge carved by the Virgin River that has rock walls a thousand feet tall.

Search and rescue teams from Washington County, Utah are assisting, local outlets reported.

Zion National Park is located about 20 miles north of the Utah-Arizona border and is known for its narrow canyons and massive sandstone cliffs.

Flash flooding has been a persistent problem in the park.