We don't have much rain here, and the carts are all kept outside, never inside. In fact a lot of them are kept at the apartment complexes across the street.

One market even lines up some of them near the door under the overhang directly UNDER THE PIGEONS! What are they thinking? The rest of the carts are just lined up in front to the store (no overhang, no pidgeons.) So they have a pidgeon problem and have put up spikey things on the beams, but why do they keep putting the carts there?