At least two tornadoes touched down in areas south of Dallas on Tuesday, tossing tractor-trailers hundreds of feet into the air and causing widespread damage, especially in Lancaster and Arlington. No deaths were reported, but rescuers were still combing debris.

As the storm system moved northeast, it later spawned another tornado in Forney, a suburb just east of Dallas, where the fire station and several homes were hit and the high school saw roof damage, NBC News reported.

One tornado hit the Flying J Truck Plaza in Dallas, tossing two trucks, said driver Michael Glennon, who caught the destruction on his video camera.

"The second trailer is ripped to pieces and thrown 50 to 100 feet into the air," Reuters quoted him as saying.

"This is a serious situation," the NBC affiliate reported over the air at the height of the storms, as meteorologists showed live footage of "debris balls" in Dallas, Ellis, Johnson and Tarrant counties, where officials were trying to get a tally of injuries and damage.