A woman salvages items from a destroyed home near Lebanon, Tenn., on Tuesday. Tornadoes ripped across Tennessee early Tuesday, shredding more than 140 buildings and burying people in piles of rubble.

NASHVILLE, Tenn. — Rescuers searched through shattered Tennessee neighborhoods for bodies Tuesday, less than a day after tornadoes ripped across Nashville and other parts of the state as families slept. At least 25 people were killed, some in their beds, authorities said.

The twisters that struck in the hours after midnight shredded more than 140 buildings and buried people in piles of rubble and wrecked basements. The storms moved so quickly that many people in their path could not flee to safer areas.

“It hit so fast, a lot of folks didn’t have time to take shelter,” Putnam County Mayor Randy Porter said. “Many of these folks were sleeping.”

The governor declared an emergency and sent the National Guard to help with search-and-rescue efforts. An unspecified number of people were missing.

Early findings by National Weather Service survey teams indicated that the damage in Nashville and Wilson County to the east was inflicted by a tornado of at least EF-3 intensity, the agency said.

One twister wrecked homes and businesses across a 10-mile stretch of Nashville that included parts of downtown. It smashed more than three dozen buildings, including destroying the tower and stained glass of a historic church. Another tornado damaged more than 100 structures along a 2-mile path of destruction in Putnam County, wiping some homes from their foundations and depositing the wreckage far away.

Daybreak revealed landscapes littered with blown-down walls and roofs, snapped power lines and huge broken trees, making many city streets and rural roads impassable. More than a dozen polling stations were also damaged, forcing Super Tuesday voters to wait in long lines at alternative sites.