Thank you for all the responses and explanations. I just couldn't figure how the volunteers could put it all together, it would have to be incredibly difficult, and the turnover of volunteers would probably be enormous.
Here in my little town, the general rule of thumb: for medical emergencies, they'll be there pretty quick. But if your house is on fire, just cry, because they won't/can't be there in time to do much to save it.
Sue