Probably wetter, probably water was drawn from wells. The alternative is, the building materials were brought in from some distance -- but then, why build there at all?
There's a Roman fort in the middle of the middle of nowhere (Jordan) that looks like a great candidate for reconstruction assisted by AI, because the building materials appear to be in situ. Reason for this is the isolation -- cut stone from ancient ruins has often been scavenged to build something new(er), but the place remains too remote for that to have happened.
“Probably wetter, probably water was drawn from wells.”
Agreed. Maybe built during a wetter, warmer phase in our history.