It actually helped me from learning the 5 Ws in kindergarten.
Where? What? How many ("Wie viele" in German)? What? Wait.
I don't have to make a call often, but all the more important is that I have that in the back of my head. I go through the first four points and then I shut up to for further questions, instructions or just a "okay, got that, sending someone".
I think that is something that everybody should learn early everywhere. Everyone can only benefit from people making short, focused emergency calls.