Behind Bev, through the trees, is the Kilauea Caldera. The sign here says "Steam vents are scattered over this fault-bounded block that has partially slumped into Kilauea Caldera. Rainwater sinks through the ground and is heated by rocks which carry heat from the liquid rock below. Hot water then rises through fissures to condense in the chilled air." So, we are standing up on a high ridge which has already "partially slumped," and which is riddled with holes penetrating down to the heated rock below. Fine with me if there is no further "slumping" today!
From BIG ISLAND #5: KILAUEA