Of course, 'mall' can mean the physical building complex, in which case anything can be 'in' the mall, but 'at the mall would almost always refer to a person. He's at the mall with his girlfriend. There's a bookstore in the mall. If you said 'at the mall', you would presumably be referring to a person. More than 200 people died after heavy rains last week caused waterways to overflow, creating flash floods that surged through suburbs south of the city of Valencia, sweeping away cars and bridg...