Is this a Haiku?

[R.C. KITCHENS]

thriving is conceptual i think.

wave of sea which would be better as waves or sea would work as would tsunami

wave surge
floods coastal area
tsunami

the idea is to make it as succinct as possible

wave surges
over sea defences
tsunami.

wave breach sea walls
citywide flooding
tsunami

on thing that some would say is missing is the seasonal word strong seas often occur at a similar time each year so at a stretch tsunami may count otherwise a seasonal word is needed. in general try not to use those small words.

have a look here

ah, as succinct as possible. I see with the examples. I'll look over the help section. Thanks