1. A system to assist with managing an emergent event in a building, the system comprising: a plurality of fixed sensors, the plurality of fixed sensors comprising sensors fixed in positions around the building; a plurality of portable sensors, wherein each one of the plurality of portable sensors is associated with a respective one of a plurality of emergency responders; one or more tracking devices, wherein each one of the tracking devices is associated with a respective one of the plurality of emergency responders; a processor, memory and inference engine adapted to: determine an expected path of one or more of the plurality of emergency responders through a portion of the building; receive information from one or more of the plurality of fixed sensors, one or more of the plurality of portable sensors, and one or more of the one or more tracking devices; determine, based on the received information, that a deviation from the expected path through the portion of the building has occurred; generate an inference based on the determination; and based on the inference, generate a suggested path through the building for one or more of the plurality of emergency responders; and a communications module in communication with the processor that displays one or more of a navigational aid and instructions associated with the suggested path to one or more devices associated with the one or more of the plurality of emergency responders.