If you can't find this information online or in a local phone book, call the local Police Department's nonemergency number during business hours and ask what they recommend. Keep this list of local emergency numbers short. Only program in the numbers for the towns, cities or counties where you spend most of your time.

But most importantly: When calling 911 from a cell phone, say where you are first. If you're unsure of your exact address, at least name the town or neighborhood and glance around quickly to see whether there's something you can say you're near (such as the name of a nearby business or street, or a noticeable landmark). Then quickly explain the nature of the emergency. Before you get into the situation details, give your cell phone number. If you get disconnected, emergency services might not know how to call you back -- but with your number, they can either re-establish contact or enlist your wireless carrier's help in finding you.