People are foolish to rely on a mobile phone for anything during a disaster or wide-area emergency.
If you want reliable information in those times, get a battery powered AM radio, and tune to your local station.
Forget about the FM music stations, they are all automated, and will just keep on playing "more music per hour than..." No one is there.
Your locally owned, small-market, analog AM station will have someone there giving you needed information.
Radios are still available starting at around $10. More expensive models also have the VHF NOAA weather band - a big plus, as in many states, the weather service radio stations are also authorized to provide emergency information, weather related or not.