I'm glad to hear the driver is safe and got out with his wallet and cell phone. I trust that your insurance will minimize the financial impact of the loss, but also know that loss of the truck itself means loss of the revenue it could produce for the driver and you.
This is a reminder to all expediters to be prepared for such things. After driving and living in a truck for a while, it gets easy to take it for granted and assume it will always be there. But a fire like this or theft can change that in an instant.
Learning from the Glen and Janice Rice experience, in which their truck burned in a terrible crash, and they got out with only the clothes on their back, and everything else in the truck -- everything -- was lost to the fire, Diane and I developed a fire drill of sorts. It will not work in every situation but it is better to have it than not.
If you had to leave the truck in an instant and could take only one thing, what would it be?
For us, it is a small bag in which everything important is kept (wallets, computer backup thumb drives, etc.). We know to grab it and run if it ever comes to that. If there was more time, we would also grab the phones, computers, jackets if needed and Diane's purse which is usually tucked away. Our fire bag is kept by the driver's seat when the truck is moving and on the bed headboard by the fire escape window when we are both in the sleeper.
Our phone info is backed up with our cell phone provider. Computer info is on the thumb drives in the bag and also backed up at home. If we suddenly found ourselves out on the street with nothing because of a burned up truck, we would be again functional as soon as we got new phones and laptops.