While I live nowhere near Tornado Alley, which is the US Plains states, I do live in Dixie Alley, which is a lesser-known tornado alley that gets some nasty tornados that can cause massive damage due to several reasons:
1. ripping up trees in a forest and throwing them along the tornado's path
2. majority of the mobile homes in the US, which are not tornado-proof, are located in the Southeastern US
3. People are not familiar with tornados occurring in Dixie Alley, so the fatalities are often higher than in Tornado Alley for similar tornados
4. Buildings are not designed to be 'tornado-proof' in Dixie Alley like those in Tornado Alley
5. The largest tornado outbreak ever recorded, the 2011 Super Outbreak, had its epicenter over Dixie Alley. Also, during the outbreak, an EF5 Tornado took out the town of Ringgold, Georgia, not far from where I live, but everything that was taken out by the tornado was rebuilt. I have a lot of memories stopping at the Taco Bell in Ringgold, pulling off Interstate 75 after going to church on Sunday and getting lunch there on the way to go shopping at Chattanooga, when I was younger. Unfortunately it and majority of the fast food chains in Ringgold were taken out by the tornado.
6. Tornados in Dixie Alley are often 'rain-wrapped' meaning they are completely shrouded by rain, so they cannot be seen by people on the ground, and can only be spotted by radar
If you want to read more about why Dixie Alley tornados tend to be deadlier than Tornado Alley tornados, check out this Wikipedia article:
https://en.wikipedia.org/wiki/Dixie_Alley