The advert is intended to remind people what sirens are for and what to do if they hear one.
Switzerland has around 5,000 fixed and 2,200 mobile sirens. Six hundred of these are designed with the purpose of issuing flood warnings.
The network was first created just before World War II when bomb attacks were a constant concern. The protocol is that if residents hear the siren they must listen to the radio, follow directions from authorities and inform their neighbors.