Water and tile floors are a bad combination, as a certain discount department store chain will tell you. It was successfully sued by a shopper who slipped and fell on the store's tile floor one rainy afternoon, injuring herself.
The evidence showed that it had been raining most of the day and that the store manager knew the floor around the store's entrance was wet. Despite this, the manager did not have store employees mop up the water, and the store did not have any mats for shoppers to wipe their feet.
Also, the store did not put up any signs warning that the floor was slippery, so the injured shopper didn't know she had to look out until it was too late.
Based on this evidence, the jury returned a verdict in favor of the injured shopper, finding that the store's failure to dry the floor was negligent.