Ryan's website is vague about where he bailed and he didn't say anything in this thread (he should have), but at some point not far from San Diego, he apparently went to Phoenix in his support car.

I would suggest that Ryan print out Amtrak's route & schedule information while in Phoenix, and read up on Amtrak's bike policy. And txvintage gives excellent advice above about understanding the warning signs of hypothermia. Ryan is about to leave the bubble of warmth of southern California and Arizona.