July 11 (UPI) — One person was found dead and hundreds evacuated in Missouri after an intense day of flash flooding across the state, authorities said Saturday.

More than 350 people were rescued in Iron, Reynolds and Crawford counties on Friday as floodwaters rapidly took over the area.

Officials said 250 of those were staff and children at Camp Taum Sauk, all of whom were safely evacuated. Another 100 were water rescues.

“It was very harrowing,” Jennifer Box, mother of of two you boys at the camp, told The New York Times. “We knew they were safe, but we didn’t know how to get to them, and that’s kind of your worst nightmare.”

One Crawford County woman, Faith Gregory, was found dead a mile downstream from her home in Huzzah Creek, officials said.

Authorities said Gregory was swept away after part of her home collapsed in the floodwaters.

“It’s definitely not the outcome we were hoping for, but it’s a tragic reminder of how strong Mother Nature can be and how forceful it can be,” Missouri State Highway Patrol Sergeant Eddie Young told FOX Weather.

The region was battered by more than 12 inches of rain, leaving many area residents remained strained throughout Saturday.

“But they’re OK,” spokeswoman Kate Moore, of Missouri Region C, told ABC News. “They’re just stranded because the roads are washed away. We have a lot of damage — the trees, buildings, a lot of things have gone and ripped the roads away.”