Get out of the way!
That's the simplest way to summarize what is called Florida's Mover Over Law. Florida State Statute 316.126 instructs all motorists, and pedestrians, on what to do when an emergency vehicle is approaching them or if they're passing one on the roadside. The intent is to give first responders the widest and safest path possible when they're responding to a call.
The rules only apply to emergency vehicles which are displaying visible or audible sounds such as flashing lights or a siren which indicate they're on an emergency run. Other drivers should yield the right of way by pulling your vehicle to the side of the roadway until the emergency vehicle has passed.
If you're passing an emergency vehicle, that is along the side of the road and has the lights flashing, you have two options. If you're on a road with multiple lanes going in your direction you should get out of the lane closest to the emergency vehicle if it's safe to do so. If it's not safe to move over a lane, you should slow down to a speed that is 20 miles per hour less than the posted speed limit.
Furthermore, the law applies to some vehicles beyond just law enforcement and first responders. Utility company trucks, wreckers, and even sanitation trucks are covered under this law.
Violations can result in fines and court fees and may add 3 points to your license.