Image shows tornado that hit town of Granbury, in northwest Texas, May 15, 2013 / Karon Campbell

At least six people were killed and more than 100 injured on Wednesday night when a tornado ripped through north Texas.

The death toll could climb because the affected towns are described as "heavily damaged" or "completely destroyed" after three tornadoes ripped through the area according to Hood County Sheriff Roger Deeds.

The region was hit hard by strong thunderstorms late in the afternoon that produced heavy rain and hail up to the size of a softball. The storms intensified after 7:00 pm local time.

We were all, like, hugging in the bathtub and that's when it started happening. I heard glass shattering and I knew my house was going. We looked up and ... the whole ceiling was gone." - Granbury resident Elizabeth Tovar

One of the worst-hit cities appeared to be Granbury, a town of 8,000 about 65 miles southwest of Dallas. Images of Granbury revealed leveled homes, badly damaged cars, uprooted trees and downed power lines.

Behind one house, a detached garage was stripped of most of its aluminum siding, the door caved in and the roof torn off. A tree behind the house was stripped of its branches and a vacant doublewide mobile home on an adjoining lot was torn apart.

It's definitely a nightmare" - Hood County Sheriff Roger Deeds

Home Depot in Cleburne was staying open all night for people who needed supplies or shelter, and other emergency items.

MedStar Mobile Healthcare spokesman Matt Zavadsky said at least 100 people were injured and in some regions, entire neighborhoods were destroyed., CBS, ABC News, and The Associated Press contributed to this report.