Tomorrow is set to be the coldest January 7th ever in Hamilton. By a long shot. 

Environment Canada predicts it will be -25 C tomorrow morning in Hamilton. That would smash the current record cold of -20 C, set back in 1968 (Environment Canada has been recording temperatures at Hamilton's airport since 1960.)

And, of course, that -25 C will feel worse due to a frigid wind chill. Environment Canada said it could feel as cold as -40 C in the wind, just three degrees shy of Hamilton's all-time wind chill record, set on Jan. 19, 1994. 

Environment Canada warning preparedness meteorologist Geoff Coulson said the cold temperatures are due to "a pipeline" of air rushing down from the north and cutting across a huge swath of North America. The winter weather system as been dubbed a "polar vortex" by some. 

What's saving Hamilton from the vortex's full fury? Lake Ontario.

"It's helping moderate the temperature, to a degree" Coulson said, adding the prairies and northern Ontario cities are facing far colder temperatures.

At 3:30 p.m. a wind chill warning remains in effect for Hamilton, and the temperature has dropped to almost -12 C. Monday's low temperature won't happen until the night time, when the temperature gets into the -20 C range.

Hamilton's medical officer of health issued a cold weather alert on Monday morning, which will likely stay in place until later this week. Wednesday's temperature is set to hold at a frigid -23 C, which would also top the 1968 cold weather record. 

Hamilton coping with conditions

In the city, Hamilton paramedics said they're dealing with more slip-and-fall calls than normal amid the icy conditions. Cmdr. Ian Wright said most of the injuries have been minor, but he said there have been some hip injuries. 

Wright also warned Hamilton residents not to underestimate the cold in the coming days. 

"If it's cold outside try and prepare yourself well," Wright said.

"Keep your skin covered up … plan your day so you don't have to be outside too long."

Paramedics are also on high alert for exposure injuries like frostbite and hypothermia, as well as injuries relating to vehicle collisions.