Environment Canada is warning of near-zero visibility due to dense fog.
On Monday, just after 5 a.m., the weather agency issued an advisory for parts of southwestern Ontario, including Waterloo Region.
“Travel is expected to be hazardous due to reduced visibility. If visibility is reduced while driving, slow down, watch for tail lights ahead and be prepared to stop,” the weather agency said.
The fog is expected to continue early this morning before dissipating around mid-morning.