More snow, deep freeze will make it feel like you're shovelling 'concrete,' expert warns

If you haven't removed the snow from your front porch, driveway or walkways yet after Monday's storm, it's time to get out a shovel. 

Two days after 45 centimetres of snow fell on some parts of the Greater Toronto Area, more is on the way. Environment Canada says we should expect between two to five centimetres to fall by Wednesday, adding another layer of snowpack to Monday's pile.

After a brief period of temperatures slightly above zero with some rain or flurries Wednesday, the mercury is expected to fall well below the freezing point overnight, hardening the snow on the ground and making it more difficult to scoop and scrape away.

"What that's going to do is have a layer of melting on the top of the snow, which is kind of going to make it a little more compact, a little trickier to get rid of if you haven't had an opportunity to shovel your pathways or driveways yet," said Steven Flisfeder, a warning preparedness meteorologist with the federal weather agency.

"Any new snow and all the snow that's already on the ground, it's going to be pretty much like concrete."

The City of Toronto deployed 600 plows and 200 salt trucks to clear snow and melt ice on public roads, sidewalks, bike lanes and trails, Mayor John Tory said at a news conference Tuesday, but it will take several more days before they are completely cleared.

"You have to do the plowing first and then begin the snow removal and it is something that is going to take time," Tory said.

"Work is ongoing 24 hours a day until the job is done."

The buildup of snow and the extreme cold temperatures present a number of potential safety issues and the risk of property damage, one expert says, which can be avoided with a few simple precautions.

"Heavy snow is not rare in Canada," said Glenn McGillivray, managing director of the Institute for Catastrophic Loss Reduction, a research organization affiliated with Western University in London, Ont. 

"We do a pretty good job at preventing property damage from snow and ice, but there are still issues here and there."

McGillivray said the first priority for homeowners and renters alike should be ensuring their furnaces are venting properly. That means removing any snow or ice that might be blocking the intake vent, which sucks air into the home, and the exhaust vent that expels it.

Failing to do this can result in carbon monoxide poisoning. The Toronto Fire Service said it received 30 calls related to carbon monoxide between Sunday and Tuesday at 12:30 p.m. alone.

While flooding isn't an immediate risk given that temperatures will remain low in the coming days, McGillivray said it's a good idea for those who are able to remove snow from the perimeter of their house to do so.