seepage in basement apartment due to recent record rainfall?

[Karen Phinney]

Hi all,
My husband and I own a 4-unit building...2 units on the second floor, and 2 on the lower level...I guess you could call them "garden" apartments. Due to the record rainfall over the past few days in Illinois, there has been some seepage into the lower level. It appars as though it comes from where the wall meets the floor, I guess it's the cove joint. It looks as though it started in the kitchen or bedroom on one side of one of the apartments, and kind of spread out from there (the other downstairs apt. barely got any .) I know the rainfall has broken records, and the tenant in the wet apartment says this is the first time this has happened in the two years she has been there. I guess I have a few questions here. Considering there has been this episode of seepage, are future episodes more likely to happen more often? Also...if a sump pump were to be put in, would it absolutely need to be installed right where the problem seemed to originate (in the kitchen or bedroom...ugh) or could it be put in a less conspicuous area like the small common laundry room between the two apartments? My husband always tells me I worry too much, but I certainly don't want to have a much bigger problem on my hands should this happen repeatedly...any advice, help, or encouragement would be greatly appreciated! Thanks,
Karen