The Toronto Region Conservation Authority (TRCA) warned people to stay away from the Lower Don River after rising water levels near the Don Valley Parkway and Bayview Avenue due to the heavy rainfall. Water levels remain dangerously high throughout the city as Toronto saw two-thirds of a month’s rainfall in 18 hours. Pearson Airport saw 31 mm of rainfall on Monday, breaking the previous daily record for June 12 that was set in 1954.