to make the tsunami, we need a Proximity Trigger, Anim Object, Water Volume, VisArea, two Cut-Scene and small flow graph system.
Create a cut-scene.
Create AnimObject and ProximityTrigger.
Select the object (see the screenshot, there is written the path to the model.).
add Anim Object in the cut-scene.
Proximity Trigger bind to AnimObject.
add track to wave animation.
select an animation.
Add Proximity Trigger in the cut-scene and make sure that Proximity Trigger was at the beginning of a wave.
Create Visarea. There should be asphalt with a cars and camera. Then, create a Water Volume.
create a second cut-scene.in the second cut-scene add camera.
Make the animation camera.
everything to work, create a Flow Graph.
The overall result.