I wouldnt worry too much,if it ever did melt most coastal city's would be under water anyways.
$1:
In late November, the EU issued a "communication" on the Arctic, a discussion paper aimed at developing a formal Arctic policy as global warming opens the region's once ice-choked seas.
Those "once choked ice seas" continue to catch ships and barges unawares freezing them in for the whole winter.(september-june)