A tsunami warning system (10) comprising a remote server with evaluation system with means for monitoring tsunami indicating parameters (16, 20), means for determining the possibility of a tsunami occurring and means for issuing a triggering signal, wherein the evaluation system is configured to issue a triggering signal when the possibility of a tsunami occurring is identified. The tsunami warning system (10) further comprises at least one tsunami warning device (14) arranged in a public area, the tsunami warning device (14) being configured and arranged so as to provide a tsunami warning to the general public when a triggering signal is received. The at least one tsunami warning device comprises means for also monitoring tsunami indicating parameters and means for transmitting information collected by the tsunami warning device to the remote server for integration in modelling means therein.