Services are adjusting and shutting down as a thick blanket of snow begins to cover Toronto and the surrounding area.
Local crews in Toronto are set to begin ploughing when snow reaches 2.5 cm on expressways and 5 cm on major roads and transit routes.
At Toronto Pearson International Airport roughly one in four flights have been grounded. Data shared by the airport shows that 26 per cent of all departures and 27 per cent of arrivals have been cancelled.
Toronto is under a snowfall warning as a major storm moves in, with Environment Canada predicting snowfall of up to 20 centimetres.
The Toronto Transit Commission said buses had begun to detour due to weather on Wednesday afternoon.