Hamilton's medical officer of heath issues a cold weather alert when the weather conditions are at or below – 15 C or –20 with the wind chill.
Extreme cold will grip the region as it digs out from a foot of snow dumped during a weekend winter storm.
A “orange” winter storm warning has been issued for much of the Greater Toronto Area (GTA), Halton, Hamilton and Niagara.
A severe winter storm has moved in, set to affect millions of Americans, including in the Greater Cincinnati region.