Im scared my kids will be killed in Middle TN?

I know I'm way to paranoid but I live in Gallatin, TN I moved here 2 years ago from Colorado to start my own life away from my family. Yes I knew about the tornadoes ahead of time. I was here for March 3rd and then I started really seeing all kinds of info. about how 30 something tornadoes touched down last year. I created a family here, one I didn't see coming or anything. I was depressed where I was and I had a friend who offered to let me stay with her in Tennessee. I came here with my daughter who was 2 1/2 at the time and now I have an older daughter who is 8 and a son I just had in June of last year with my husband that I married in December. We can't move because he has a son with another woman who lives here. We have tornado starting next week. I'm so scared I'm going to lose my kids living here.. Any advice or anything someone can say or help. Me with. I'm constantly worried and worrying. And no we don't have a basement.