Our front gate is a bit less than 100m back from the water's edge and we face out to the Tasman Sea on the West coast of North Island. As best I can figure we are around 3 meters, at least, above sea level but there is a rise of another 1 to 2 meters between us and the sea. Modeling for a 9.2 earthquake off the East coast of North Island in the Hikurangi Trench with the tsunami coming through Cook Strait and wrapping up the West coast towards us gives a wave run-up height here of around 2 meters and takes about 1 hour to get here, so I'm hoping we're safe from that. At worst, maybe just stay upstairs so we don't get wet feet
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As a low risk area we don't have blue lines on roads or sirens locally but are warned that an ordinary fault out to sea from us ("ordinary" as there is no tsunami generating subduction zone in the Tasman Sea) may generate a tsunami of concern but it would be generated very close and arrive before any warnings could be given. Despite that, we do have people here who get angry and worried because we don't have those pretty blue lines and mournful sirens to test every year like high risk places do.
I haven't been to the North Island East coast cities of Napier and Gisborne that face the Hikurangi Trench since it became fashionable to have blue lines just in the last couple of years, but in Lower Hutt City at the Northern end of Wellington Harbour and which faces the narrowish harbour entrance 7 miles away I've noticed blue lines as far as a couple of miles inland in areas adjacent to the river that runs through the city.