What should I do when an emergency vehicle approaches with emergency lights on?

When an emergency vehicle displaying emergency lights is approaching, all drivers of every other vehicle shall yield the right of way by moving to the right-hand edge or curb that is not in an intersection and stop.  Drivers must remain stopped until the emergency vehicle passes.

If an emergency vehicle is parked or stopped at the scene of an emergency and is displaying emergency red, white, or blue lights; all drivers must move to the right and stop. After completely stopping, drivers may proceed with caution unless otherwise directed.