Copper phone lines (or more likely copper clad aluminum these days) are still dominant everywhere, although phased out in some areas. Where it's not around, all the more reason to have a smart phone in an emergency situation. Basic mobile phone service is usually cheaper than line phone service for basic calling, unlimited international long distance, texting, & usually has Facebook & Twitter messaging at no additional charge.
In an emergency, even if the local cell tower power goes out (but some of them have generator back-up too), there's a good chance you may be able to hit another tower a dozen miles away - esp. if you go out in an open space, or try from a window of an upper floor of a building, or from a hill to increase your range. Most smart phones can get wifi & the internet too, if you don't want to pay extra for a data plan. If the power & tower is out, if you can get within a block from an active wifi spot, you can still get a message out, read about the emergency to know what to do or where to go.
It's essential to get a Facebook account. Many of your friends & family have an account, I find women, young people, mac fanboys, & self employed use it the most. If you can't get a call or text out through the tower, you can message somebody through their Facebook or have them relay your message to somebody not on Facebook if you can find wifi somewhere. People don't check their email frequently or only every few days, so email won't work for emergencies. People check their FB account often, or have FB messages sent to their phone in real time.
In an emergency you can get your communications out near any wifi, through Facebook messaging & texting.
A portable CB radio "walkie talkie" is handy for emergencies too. All state, county, provincial, & some local local police monitor emergency CB channel 9 for emegencies in the USA & Canada. You don't need a license to use one. A CB portable is a lot bulkier than a phone though, using 8-12 AA batteries to have enough power to transmit long at 3-5 watts. With their short antennas they only have a range across half the city, but in an open area, on a upper floor, or on a hill that range can be more. More likely then not, there will be an emergency official monitoring channel 9 within your range.
In an emergency, officials monitoring channel 9 will relay a message to who you need to get it to for you.
And the 8-12 AA batteries in it can serve as spares to use in your emergency LED lights, & a nice portable AM-FM radio. You need a durable sensitive AM radio for emergencies to tune in the news, emergency reports, storm updates, find out what's going on, & what to do. For around $10 you can get a nice sensitive AM-FM sony pocket radio that will run about 60 hours on a pair of AA batteries. Sitting in the dark with no power, perhaps for days, the radio, news, & music can save your sanity. It will bring a sense of normalcy or comfort to a dire or panicked situation. At night AM radio can pull in stations from the entire continent, so you'll have plenty to listen to.
Avoid AAA or button battery powered lights & radios. They don't have enough energy to last the long term. An AA battery has 3 times the power than an AAA battery. For survival you don't want super tiny& miniature, you want long lasting & durable.
However, I have a couple solid all metal keychain LED lights powered by a single AAA cell. They'll run up to 10 hours on a singe cell. Not very bright but pretty good, & after 6 hours they start to get dimmer. I have a couple plastic LED lights that dimmed down to their lowest setting will run 96 hours on a single AAA cell. I also have a couple AA versions of it too. 156 hours of light on it's lowest setting on a single AA cell. The lowest setting is pretty dim, but makes a nice nightlight during a power failure.
There's also my modified Ray-O-Vac LED lantern which will light up an entire room very bright for 150 hours. It runs on 4-D cells. "D" cells have 4 times the power an AA cell has.
If you have an old flashlight with an old incandescent bulb in it, throw it out or replace the bulb with an LED direct replacement. LEDs run 4-20 times longer on the same batteries, & are more reliable. Everybody uses LED flashlights & lanterns for 15 years now. The newer modern ones are very bright for the power they consume, & won't burn out when dropped.