The occurrence of the natural disaster is a big loss for human life and property. Here we introduce an embedded system called black box which has a water level sensor that helps in the rescue mission. The black box system is an embedded system with two sections, one section in user side for interacting with the user and another section is in authority side to track the location of the user and to provide the service. Our system is trying to avoid the problems created due to natural disasters. Hence it was concluded that Black box system ensures the maximum safety of mankind and infrastructure.