A system includes one or more sensors to gather information about an environment, a memory device that stores one or more computer executable components, and a processor to execute the computer executable components in the memory, including an event detection component to obtain information from the one or more sensors and identify whether a first level event has occurred based on the obtained information, a coalescence component to consolidate a plurality of events into a hierarchically higher-level, pre-defined coalesced event, and a communication component to send to one or more users a notification of a hierarchically highest level event determined to have occurred during a pre-determined time range.