A series of low pressure systems that pushed into southern Ontario brought a wintery mix to some areas over the weekend.
Light snow began falling in the GTA Sunday afternoon before changing to rain and freezing rain through the evening hours.
Several accidents were reported across the region as ice pellets froze roadways and made for slippery conditions.
"On Warden Avenue at Highway 407 in Markham, there were reports of around 15 cars involved in a crash due to severe ice and freezing rain," said camera operator Mark Rozitis who was in the thick of the wintery mix Sunday night.
Elsewhere in Markham, another serious multi-vehicle accident at Kennedy Road forced police officials to close the road for several hours.
A section of Highway 400, just north of Toronto, was also closed after several crashes occurred there.
Temperatures continued to climb through the overnight hours and the precipitation changed to rain in the GTA by early Monday.
The freezing rain continues to affect much of eastern Ontario however.
"Anywhere from Muskoka to North Bay and east to Montreal will see the risk for freezing rain through the morning hours Monday," warns Brian Dillon, a meteorologist at The Weather Network.
That prompted several bus cancellations in places like Peterborough, Muskoka, Haliburton and Ottawa.
Flight delays and cancellations were also reported at Ottawa Airport Monday morning. Travellers are being asked to check their flight status before heading out.
Motorists are urged to exercise caution on the roads as well as untreated roads and sidewalks will likely be slippery.
Be sure to tune into The Weather Network on TV as we continue to closely monitor this system and visit our Alerts page for all your watches and warnings.