The invention provides a system and method for reporting hazard and event information from a mobile unit, and using that information to warn a user of an event or future hazard with reference to the mobile unit's location and/or intended direction of travel. Users may wirelessly report events or hazards to a central server in an event center by sending data to the event center via a wireless communications network. Secondary information may be included, based on the selected event type, along with images, audio, and video of the event. The event center stores event information, including event locations based on the locations of the transmitting mobile units, and makes this information available to allow other users to respond to the hazard or event.