Folks, one thing to remember when you are stuck is; START A FIRE
You have all sorts of combustible materials: Gas, engine oil, tires. You may have a hubcab that can be used as a bowl for gasoline. You may have clothing or blankets that can be soaked in gasoline and spread over a bush. They would have had some scrubs trees / brush from the location they were at. Their trailor would have been full of flammable items: bedlinens, towels, paper goods. They likely had perhaps 10 or more gallons of fuel in that vehicle.
A burning tire or an engine oil fire is very smoky and will attract the most attention.
Anything to get someone up there to find you.
Before anyone starts a fire, please read about the Cedar Fire in San Diego county started by a lost hunter. It burned 273,000+ acres, 15 people died, people I know lost their homes, and the man who started the fire was arrested, although given a light sentence. I understand the inclination to save oneself by starting a fire, but in a years-long drought such as we have here in the west, starting a fire is just plain irresponsible, and the fire you start can kill you or others before you are rescued. There must be a better way.
Cedar Fire - Wikipedia
Investigation[edit]
Investigators determined that the fire was started by Sergio Martinez of
West Covina, California, a novice hunter who had been hunting in the area and had become lost.
[21] Martinez initially told investigators that he had fired a shot from his rifle to draw attention and that the shot had caused the fire,
[22] but he later recanted and admitted he started the fire intentionally to
signal rescuers. After gathering sticks and brush together, Martinez lit the brush and quickly lost control of the fire because of the heat, low humidity and low moisture content of the surrounding vegetation.
Martinez was charged in federal court on October 7, 2004 with setting the fire and lying about it.
[23] In November 2005, a federal judge sentenced Martinez to six months in a work-furlough program and ordered him to complete 960 hours (40 days) of community service.
[24] He also was sentenced to five years' probation and to pay $9,000 in restitution.
[25] As part of the
plea bargain, prosecutors dropped the charge of lying to investigators.
[24]
ETA: I see others have mentioned the Cedar Fire.