I've heard AirEvac pilots state that they are going to do a hot load or hot unload at a scene or hospital.
When the helipad is on the roof of the hospital, there is no way to get a engine company anywhere near it, let alone a CFR or foam truck.
I was thinking that F1 was standing by as an aircraft was being refueled while the engines were still running, rather than while a patient is being loaded into or unloaded from a helicopter or fixed wing medevac.
John
Peoria