(CNN) Nine people are dead and one is missing after flash flooding swept away a family at a swimming hole in central Arizona, police say.
Fourteen family members were near the Cold Springs Swimming Hole on Saturday afternoon when heavy rains caused flash floods, said Sgt. David Hornung with the Gila County Sheriff's Department.
The victims have not been identified. Police said Sunday that six children between the ages of 2 and 13 are among the dead, and the oldest victim was in their late 60s.
The missing family member is a 27-year-old male, Hornung told CNN Sunday.
Four family members were rescued Saturday afternoon, said Hornung. Their conditions were unknown Sunday, CNN affiliate KNXV reported.
Cold Springs is just north of Payson in Gila County, and about 90 miles north of Phoenix.
Flooding left behind path of destruction
KNXV in Phoenix tweeted a photo showing the conditions in the area.
The photo showed the grim aftermath of Saturday's flooding, which left behind an avalanche of mud and rock that flowed into the swimming hole.
A search and rescue mission was underway for the missing family members. The Gila County Sheriff's Office, Tonto Rim Search and Rescue, Arizona Department of Public Safety Ranger Helicopter, Whispering Pines Fire Department and US Forest Service participated in the effort.
Trent Shue is a volunteer with the Tonto Recreation Alliance. He and other members were out signing trails close to Ellison Creek, about three miles from the watering hole, when the storm hit.
"In a short period of time, the creek along the side of the road started to get exceptionally heavy," Shue said. "We could hear the roaring of the flash flood in the distance, and it was something to behold. We made sure to stay far ahead of the rushing water, and finally found a safe spot where we could wait it out."
A video recorded by Shue shows a strong stream of water carrying heavy logs and wiping out trees in its path.
Flash flood warning
The National Weather Service has issued a flash flood watch for much of Arizona, including the greater Phoenix area, through Monday evening. Storms are expected into the middle of the week.
ABC 15 tweeted a viewer's photo in the Sun City area, which showed several cars moving through a flooded street.
CNN"s Jessica Suerth, Charles Levin and Ali Holston contributed to this report.