Having dealt with 74f, and also chemistry I am trying to work out what on earth can save this.
An inerting device would not have worked.
Keeping the nasty Li batteries away would.
You can't ban them because they will always find their way over here, or where ever that might be.
To kill an Li fire is very, very difficult. Most will say CO2 or N2 type extinguishing, but H2O is by far the best, in other fires it will kill you.