Amazon is going to get sued hardcore, guaranteed. The issue is that nobody had to die. Even kids’ summer camps in tornado prone zones have this figured out. The summer camp I went to had 2 rooms in the camp’s gym that were formal tornado shelters. The gym, with these tornado shelter rooms, were built in 2001. The entire camp (300+ people) could fit in these rooms. Everyone could technically sleep in there too, but obviously they would split us up into boys/girls rooms and the counselors would still be watching us the whole time.

The 2 rooms themselves were basically a 12” enclosure (including the ceilings). There were also concrete pillars in the room to reinforce the structure. During normal times we used them for various activities. But, at least during a couple of summers, we had to evacuate (from the cabins or wherever) there. The program staff (people in charge of the camp) were always monitoring the meteorological radar 24/7. This was in North Texas, which is tornado alley. The camp was an hour north of the Dallas/Ft. Worth metroplex.