Treacherous driving conditions are wreaking havoc on the roads, with London OPP reporting 90 accidents in the west region.
School buses have been cancelled across Middlesex, Oxford and Elgin Counties, but are running in the City of London.
More than 5,000 households in the Aylmer area lost their power.
Motorists can also expect to deal with blowing snow with winds from the east gusting to 60 kilometres per hour.
Temperatures are expected to hold steady near - 2 Celsius.
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