Today, I had to call the Henderson, NV. 911- not for an emergency, but needed police assistance. I was put on hold for about 3 minutes, from the time the call went through to the time the call was answered. I had to listen to the recordings of not to hang up in English, Spanish and TTY for the deaf.
In that amount of time, 3 minutes, someone in caridac arrest would be brain dead.
So, if you call 911 in Henderson, you better hope that it is not an emergency.