So sorry to hear this David!!! really really sucks
I'm an all electric flyer and have tons of lipos. I've been doing all lipo since 2007 (rc for 30 years) and have had no issues... but with that said I was lucky enough to see a lipo fire at the field early on.
It was only a 4s 5000 mah pack that went off after a really hard landing that ripped out the gear on a fellow members plane. The fire from the plane was intense, smoke looked like a military smoke grenade.
It was a huge eye opener for me, at that time I had old packs laying all around my shop... it was at that point I cleared out old packs.
Started taking notes on packs I.R. per cell, balance, put all my packs in storage charge when not in use. It has been shown that when a pack is in storage charge or down to 3.7 the fire potential is much less than a fully charged pack at 4.2 per cell. I put them all in lipos bags and place them in vented ammo cans...
When I have packs that are showing bad balance, high IR, or any damage they go right away.....
With the very fast charge rates these days and even at 2c it's only 25 minutes I now only charge at the field outdoors... if I do charge at home it's on the side yard.

For now my packs are still in my shop, but the next step is to put a small refrigerator in my shed with an inline thermostat to keep the fridge at 60 degrees year round.
This will allow me to pull them out and use them right away and not have to wait for them to come up to temp and get them out of my shop

These packs must be treated with great respect their fire potential is amazing and the smoke they make is toxic (stay up wind)
I love electric power for me it's the only way I will do this hobby but I now know what the danger is and do all I can to keep safe

So sorry to hear about this..... thanks for posting as we all learn from it