Coastal flood warnings are issued when rising sea water threatens low-lying coastal areas, and short alert sounds have long been used to make those warnings impossible to miss. Online, clips like this one are shared by creators who need a quick, recognisable signal for storms, hurricanes and flooding without recording a real broadcast. Its brevity makes it useful for short-form video, news parodies and educational edits, where a few seconds of urgency can set the scene before any footage or explanation begins.