The “Stupid Motorist Lawâ€, which corresponds to section 28-910 of the Arizona Revised Statutes, states that any motorist who becomes stranded after driving around barricades to enter a flooded stretch of roadway may be charged for the cost of his/her rescue.
If public emergency services (such as a fire department, or paramedics) are called to rescue the motorist and tow the vehicle out of danger, the cost of those services can be billed to the motorist, plus additional liability of up to $2,000.
The flash flooding scenario seems a bit narrow. Motorists do stupid things all the time, not just in high water situations, and what about Stupid Hiker Law and Stupid Back Country Skier Law? And Stupid Twenty-Something Driver Law?