1. A system for providing warnings of hazards to a user, comprising: a first sensor that detects at least one of a region and an object in an environment of the user; a second sensor that detects an activity of the user, wherein the first sensor and the second sensor are configured to be worn by the user; at least one acoustic transducer configured to be worn proximate to an ear of the user; a memory storing instructions; and a processor coupled to the memory, wherein, when executed by the processor, the instructions configure the processor to: identify a hazard based on at least one of the region and the object detected by the first sensor; determine whether the activity of the user detected by the second sensor indicates awareness by the user of the hazard; and upon determining that the activity of the user does not indicate awareness of the hazard, output to the at least one acoustic transducer an audio warning for the hazard.