Could the World Sink Underwater?

A climate impact map shows the number of days per year we'd get surface temperatures greater than 35 degrees Celsius in various regions on Earth. This is a good illustration of the sorts of areas that might become too hot for humans to survive with more than 7 degrees Celsius of warming. An increase of 13 degrees Celsius would make working outdoors impossible for most of the year in the tropics, and around half the year in currently temperate regions. But even with the cloud feedback loop, it would take decades for global temperatures to reach this level.