[LesbianThespianGymnasticMidget]

Graph showing normal rate of cooling of lava over time with depth from the surface. dýpt í metrum = depth in meters; storkunar lína = solidification front; sjálfkæling í hrauni = self-cooling in lava; ár = years.

Cooling to 200C in a year is not unrealistic.

[outofsalt]

Your chart is in ^oC. Looking at the depth in meters, it would be 10 years before a 2 meter depth cools to boiling point of water.

With the house surrounded by lava, they're going to need a kicking A/C system.