If you're heading up the highway to Hamilton or the GTA, you might want to give yourself some extra time, a fog advisory is in effect for the region.
Environment Canada says the fog will slowly lift later this morning as a slow moving warm front finally moves through to the north of the area.
Flights were cancelled last night out of Billy Bishop Airport because of the fog.
So if you are heading out of Hamilton or Toronto airports this morning, check before you leave to make sure your flight is still on time.