I'll probably get censored, but exactly what do you not understand about "severe drought? It is real and you are likely contributing to the problem. But of course, YOU are only doing what you want. You can't possibly be part of the problem. Washing your RV with water, steam (water) in the midst of a major water shortage? Why sure! Go right ahead! Your RV is VERY important in the grand scheme of things
In the interim, I'd strongly suggest that you investigate the many sites devoted to planning for having little to no water and act accordingly. Won't happen to you? Good luck with that.
And, I am FAR from a doom and gloomer. I am a realist.