What good is a weather app when the network is down? Not much -- typically. But with an upcoming Weather Channel app for Android, IBM is offering one solution for emerging markets: "Mesh Network Alerts," a new technology that can transmit notifications from phone to phone via Bluetooth and WiFi. It's potentially much more useful than typical emergency alerts from governments, because those don't work when cellular networks go down. The app offers much more than just a mere weather update, in some places it could up saving lives during emergencies.