Trista Boga, center, helps salvage what she can from a friend's home along Highway 178 in Holly Springs, Miss., on Thursday, Dec. 24, 2015. At least 10 people were killed in Mississippi, Tennessee and Arkansas as spring-like storms mixed with unseasonably warm weather and spawned rare Christmastime tornadoes in the South.

Authorities raised the death toll Thursday night to 14 people, including a young boy, after a spring-like storm system swept across the Southeast.

The storms mixed with unseasonably warm weather, spawning tornadoes that killed people in Mississippi, Tennessee, and Arkansas. Dozens more people were injured.