When Mrs. Montag invites the ladies to come over for some mutual television, she answers the door "like a native fleeing an eruption of Vesuvius" (pg 93) This is a reference to the volcano that erupted spewing fire over the natives below.
Montag watches the ladies and says that he saw their "Cheshire cat smiles burning through the walls of the house." ( pg 93)
He turns off the television or the three walls, and the three ladies become uncomfortable. They light cigarettes and are "blowing smoke" (pg 95) while they are fingering their "sun-fired hair" and examining their "blazing fingernails as if they had caught fire from his look." (pg 95)
Finally, they become so uncomfortable that they are "burning with tension." (pg 96) The volcano image emerges again with "they might hiss a long sputtering hiss and explode" (pg 96)
When Mrs. Montag asks him to read Dover Beach, the room becomes "blazing hot" to him and he was "all fire". He feels that the women "sat in the middle of an empty desert" (pg 99) and, when he read the poem, his voice went out across that desert, but they sat in their "great hot emptiness." (pg 99)