You just might need your ice skates if you plan on getting around tomorrow. Ice rain is expected to start late this evening and into Tuesday Morning, so rush hour should be a complete mess. So ensure your walkways are well salted, and if you don't have to get around tomorrow morning, you might do yourself a favour and stay home.
Here is Environment Canada's Warning issued Monday, January 16, 2017:
Ice build-up due to freezing rain is expected or occurring.
Freezing rain will begin this evening in Southwestern Ontario, reaching Toronto overnight and continue to spread eastward Tuesday morning.
Freezing rain will change to rain on Tuesday morning in portions of Southwestern Ontario and Tuesday afternoon for areas near Western Lake Ontario. Freezing rain accretion of 2 to 5 mm is possible on untreated surfaces. Higher amounts are possible in the Dundalk Highlands, where freezing rain is expected to persist into Tuesday evening.
For regions east towards Peterborough, freezing rain could last into Tuesday night.
Surfaces such as highways, roads, walkways and parking lots will become icy, slippery and hazardous. There may be a significant impact on rush hour traffic in urban areas. Utility outages may occur.