Yes, and move uphill, and north if the seas rise
There would be a lot of good real estate in Antarctica and northern Canada/Siberia.
Or move down south, if the glaciers cover half of the Earth.
In that case, there would be also lots of land available because the seas will recede. E.g. Florida will double in size!
Life on the Earth always survived and always adjusted to whatever climate God send us.
Anything else is an excercise in futility!
I live at about 2800’ elevation (and several hundred miles inland), so I’m not concerned about sea levels rising or tsunamis.