Heavy rain already had filled the yard, and Casey Hipshire expected her Middle Tennessee home to flood, she said. But the speed of the rising water caught her off guard.
"All of a sudden it was like a tidal wave that just came over the road and into my yard," she told CNN.
Hipshire rushed to pack a bag and save herself, her 8-year-old son and her husband.
"Next thing I know the water is in my house, and it’s up to my chest," she said.
"And my house fell off the foundation while we were still in it, so we had to break the window in the kitchen and crawl out of it and get up on the roof as fast as we could."
Hipshire’s family survived the Saturday flash floods in Middle Tennessee that left at least 21 people dead and 25 people missing, authorities said Monday.