The Arctic is thawing very rapidly. Thawing permafrost is loaded with organic matter that is generating methane (several factors greater impact than CO2) and spewing it into the atmosphere. As more methane is released the temperature increases faster, spurring an exponential spiral that is greatly outrunning the previous "doomsday" models.

These sea level rising and other global weather impacts are no longer predictions. It is unfolding very fast. The artic circle is literally a giant cow fart from hell right now.