In this case, they would. If you could see the rough topographical map I drew, you would notice that the southwestern 'arm' of the city is sort of on a ridge, whereas the docks and slums are sort of on the mudflats. The climate also has something to do with it, of course; this port is at about the same lattitude as Spain or mid-california, and ends up with the same dry, warm climate (which I could go into more detail about the climatology behind, but I will suffice to say that both spain and mid-cali are between a northern 'cold and rainy' system and a southern 'warm and rainy' system).
Anyway...I inked in the drawing by hand, rescanned, and made the finishing touches about an hour ago. I'll post the updated version in a few minutes, with the key.