[sz3]

As far as yesterday was concerned, Edwardsville (and neighboring areas) knew they were in the line of fire by 8PM local time. The tornado hit the facility at ~8:40.

Source: my phone blew up with 3+ emergency alerts starting at around 8. (here's a NWS tweet from 7:45 -- you can see what we were dealing with: https://twitter.com/NWSStLouis/status/1469483383994691586)

Things can get out of control quicker (15-20 minutes warning is usually as close as it gets), but I think it's definitely reasonable to suspect negligence in this instance. There are two possibilities, imo:

1. They had enough time to get people to shelter, and chose not to 2. The facility wasn't up to par