In the situation that you see an emergency vehicle approaching react quickly but calmy. Use your signals to alert others that you will be pulling over.
You will want to stop your vehicle, if it is safe to do so, and move to the right-hand lane out of the way of the approaching ambulance.  Do not move onto the shoulder of a roadway as emergency vehicles may choose to travel on it to avoid vehicles and or blockages.
For more information please visit: https://www.ontario.ca/document/official-mto-drivers-handbook/dealing-particular-situations#section-9