The service said there were multiple water rescues ongoing across southern Nashville and there were “people clinging to trees.”
“This is a life-threatening situation — do not travel tonight,” it said early Sunday morning.
There are also reports of possible tornado damage in the wake of the current storm system.
Late Saturday afternoon, radar showed possible twin tornadoes in middle Tennessee, about 80 miles southwest of Nashville — one near Linden and the other just east of Lexington. Two houses were “extensively damaged, one of which was destroyed” by a tornado Saturday evening in Middlefork, near Lexington, Henderson County Sheriff Brian Duke told CNN.
Several structures and homes were also damaged Saturday night when a tornado moved through Rusk County, Texas, according to David Chenault, spokesperson for the Rusk County Office of Emergency Management.
“We have had quite a bit of damage in the Mt. Enterprise area of Rusk County,” Chenault said.
Most of the roads in that area were blocked by downed trees, the spokesperson said, and utilities are out.
The NWS has not officially confirmed any tornadoes in Mt. Enterprise but a tornado warning was in effect around 7 p.m., when the damage occurred.
CNN’s Andy Rose and Tyler Mauldin contributed to this report.