Human life saving is taking prominent role in the society, Unfortunately some of people meet accident every day at any time in various incidents. Here the accident happen due to flash flood which is rapidly changing in a river, leads to ultimate damages to the people lives and their properties at most of time in perilous locations like waterfall, River bridge and residing areas, which are in the vicinity of the river. Predominantly the people are gathering to visit the waterfall across the river and peripatetic on the riverbank or inside the river during slow water flow, some times it leads to fatality of people who are inside the river due to flash flood, since it can't be predictable in earlier. The proposed system is providing a solution to save the people lives under this kind of circumstances. The system has transmitting processor unit must be installed at least minimum of certain kilometers away from the perilous location to which the information about the flash flood parameters like flood velocity, volume metric flow, flood level rise per unit time and time consumption to arrive remote location for making awareness among the people peripatetic in side or any hazardous zone of the river. Here the big foot sensor working under ultrasonic principle is suggested to measure the above flood parameter and send to the Transmitting processor unit, which estimates the arrival time by the flood to reach the remote risky location. The processed data send to the receiver unit located at remote perilous location for making early sound and visualization alert of flood parameters on the large size screen. So that the people acquire adequate time to reach safe zone. The Transmitting processor unit starts to send this information to the receiver unit installed on both side of riverbank, if the flash flood parameter crosses the dangerous level. The sound volume is programmed to be changed gradually according to the rate of flood parameters.