Couple of the owner-operator water trucks the contractor I worked for were on the call out list for CalFire or USFS whichever it was or both. Come fire season we just figgered they could disappear any day. The call outs paid them well, 24/7 whether they hauled 50 loads per day or none. One of them came back from a fire with a story about being forced to take cover inside his water tank as the fire blew over his truck, fine one minute and the next he was cutoff from escaping and surrounded by the fire. .