It doesn't take a lot of meters to pose a big problem for Victoria, BC. Look at a topographical map: https://en-ca.topographic-map.com/map-1926m2/Victoria/?cente...

That said, https://www.esquimalt.ca/sites/default/files/greater_victori... is built on more up to date information than I had. And suggests that subsidence + tsunami is only 4 meters. Which doesn't pose a serious threat. (If they are wrong and get a 10 meter combination, of course, that would be a far, far worse story.)