A set of data is received at a server from a corresponding set of mobile devices. At the server, a first data in the set of data is analyzed, the first data being received from a first device in the set of mobile devices, the analyzing detecting an event of interest in the first data, the event occurring in a first geographical area. Using the event, a future event is predicted in a second geographical area. A target area is computed, where the target area includes a location where the future event is likely to occur. A notification about the future event is sent to a second set of devices located in the target area.