There are internet and electricity outages in many places over the world, controlled and uncontrolled. Also natural desasters take out infrastructure at least temporarily.

One "popular" example for those whose horizon doesn't extend over US country borders:

"Hurricane Katrina devastated communications infrastructure across the Gulf Coast, incapacitating telephone service, police and fire dispatch centers, and emergency radio systems. Almost three million customer phone lines were knocked out, telephone switching centers were seriously damaged, and 1,477 cell towers were incapacitated. Most of the radio stations and many television stations in the New Orleans area were knocked off the air. Paul McHale, the Assistant Secretary of Defense for Homeland Defense, summarized the damage by stating, “The magnitude of the storm was such that the local communications system wasn’t simply degraded; it was, at least for a period of time, destroyed."

https://georgewbush-whitehouse.archives.gov/reports/katrina-...

"Our preparedness culture must also emphasize the importance of citizen and community preparedness. […] Thus, citizens and communities can help themselves by becoming more prepared. If every family maintained the resources to live in their homes without electricity and running water for three days, we could allocate more Federal, State, and local response resources to saving lives. Similarly, if every family developed their own emergency preparedness plan, they almost certainly would reduce the demand for outside emergency resources. As the 9/11 Commission Report states, “One clear lesson of September 11 is that individual civilians need to take responsibility for maximizing the probability that they will survive, should disaster strike."

https://georgewbush-whitehouse.archives.gov/reports/katrina-...

Project Nomad – Knowledge That Never Goes Offline