Final answer:
The metaphor of a circus used to describe the house burning scene signifies the spectacle and public attention akin to a public entertainment event that disasters attract, with possible societal critique.
Step-by-step explanation:
The author describes the end of the house burning scene as the end of a circus to underscore the spectacle and public attention such disasters attract. Just as the Circus was a grand public space where attention was focused on entertainment and spectacle, the burning of a house becomes a similar focal point for the spectators. The author likely uses this metaphor to convey the drama and the throng of the event, with onlookers gathered as if they were watching a circus performance, while also possibly critiquing the societal reaction to such misfortunes where the suffering of individuals become a form of entertainment for others.