Maybe you are in a hurricane's path. Or maybe you just forgot to pay your bill. The fact is: many factors can leave you without electricity. And with no power, chances are you are going to lose your internet access too!
But that does not mean you'll have to stay completely away from social networks. Twitter and Facebook still let you post from you phone! Like that, you can let your family and friends know you're OK, ask them for help or just let the world know you are afraid of the dark.
For Twitter you need to enable your mobile phone in your account on Twitter.com (and for that you do need electricity). Go to "Settings" then "Mobile". Insert your cellphone number under “Activate Twitter text messaging,” and then you’ll have to text “GO” to the number 40404. That should activate the service. New settings on the webpage allow you to control text notifications.