WOW!  thats serious.  I have been camped in the washes before when alot of rain hit and we truly got to see why they call them the "washes".  The rain directly upon us wasn't the issue, it was all the flash flooding from the surrounding mountains, the water came running through from the NE side of the tracks.  Completely flooded out all the camps. 2 hrs later it had soaked in leaving the mess behind.