Problem: What prevents water at the bottom of the underground caverns from boiling at the normal surface temperature? Need Assignment Help? View Available Hint(s)for Part C The magma body below does not reach a sufficient temperature for water to boil. The water has a lot of room to expand; therefore, the boiling point increases. The addition of cooler water from surrounding pore space causes boiling point to increase. The pressure from the weight of overlying water causes the boiling point to increase. The narrow conduits present between caverns cause boiling point to increase.