Communicating news of severe weather events or natural disasters is something mobile phones are well suited to, but if there's limited or disrupted network coverage the message may fail to get through. But not anymore. From a CNET report: A new Weather Channel app, though, can get the message through even during earthquakes, tornadoes, and terrorist attacks when mobile networks can be overwhelmed and may not work. The Android app, geared specifically for developing countries, uses IBM-developed technology called mesh networking that sends messages directly from one phone to another. The result is that information can propagate even when centralized networks fail. Using Bluetooth and Wi-Fi networks, the app can send data from phone to phone across distances between 200 to 500 feet, IBM Research staff member Nirmit Desai said. It doesn't add any more battery burden than an ordinary app, and the mesh network can be used without having to reconfigure the phone's network settings.