Ithaka O. 
When Paths Cross In the Desert [EPUB ebook] 
a short story

In the middle of the desert, a giant dome stands, made of fortified glass.
Inside it: another, much smaller dome, black for privacy.
Outside: thirsty humans. Hundreds, possibly thousands.
Nora Haynes spends Eternal Summer inside. Luck blessed her that way.
Timothy blessed her that way.
But as the knocking of the madpeople continues, clamoring for water, her little bitter trick of ignoring them threatens to fall apart…