Is there an exception to liability for allowing water from melting snow on a roof to run across a sidewalk?

The second exception is that an owner owes a duty to ensure that conditions or activities on his or her property do not leave the property and cause injury to others. This was illustrated in Brazzoni v. Timmons (City), [1992] O.J. No. 254 where the court held that the bank was liable allowing water from melting snow on its roof to accumulate, run across the sidewalk and create a dangerous situation that it knew or ought to have known could cause injury to pedestrians using the sidewalk.