You mention Ottawa and I have a belief that Canadian models employ a DRL system.
The daylight running light system would employ separate bulbs (think of Audi LED strips), but in cars without separate lamps for that, the system just turns on the high beam at reduced output (the HID low beams are usually spared this duty for longevity purposes).
I know you said all lights minus fog, but could you verify whether:
1. Even the taillights still come on
2. It is the low beams or high beams at the front
3. Anything changes when you adjust the headlight sensitivity (
https://youtu.be/uWEnmu5bpWU)
4. Your car is a Canadian model with the speedo displaying mainly Km/hr