Iranian navy Rear Adm. Shahram Irani declared that his country has “property rights” in Antarctica, particularly the South Pole, in a newly surfaced video.
“With regard to the South Pole, we have property rights there, and they belong to the public,” Irani said in the video of a television broadcast from last fall.
He added, “Our plan is to raise the flag there, inshallah. It is not only military work but also scientific work that needs to be carried out.”
If it totally melts the amount of trapped methane will release will be enough to kill everything on earth. So I don't think it'll be a major problem we'll have to deal with.
Also if the temperature rises by over 100° in a decade in the Antarctic presumably even the temprate zones will be hotter than the surface of mercury.