As Hurricane Irma flooded the streets of Miami on Sunday afternoon, voice after voice beeped to life in a Miami channel on the walkie-talkie app, Zello. One person said his food was wet, and asked if anyone might come help him evacuate. Another said he was compiling a database of people with boats and others willing to volunteer to any rescue effort. Others asked simple questions such as, "what category is the hurricane?" and "how's everybody doing in Miami?".