This app was mentioned in 3 comments, with an average of 2.00 upvotes
I use a very similar one: Pacific Disaster Center
They also have a nice map: https://disasteralert.pdc.org/disasteralert/
and an app: https://play.google.com/store/apps/details?id=disasterAlert.PDC
This has alerts for everywhere. Really useful.
http://www.ga.gov.au/scientific-topics/hazards/tsunami/australia#heading-2
They are general risk maps...
If you are worried about tsunami.. https://play.google.com/store/apps/details?id=disasterAlert.PDC&hl=en
get this map...
The trick with Tsunami, is have an evacuation plan...( You just need high ground above say 50 meters worst case) or a big building you can access
https://www.youtube.com/watch?v=TwCnnv3CDUk&ab_channel=BaNanaTootsieroll
if you ran you survived.