How does the setting affect Meursault, in The Stranger by Albert Camus?

The setting that
impacts Mersault most pointedly is that of the hot beach at the end of the first part of the
novel. This setting affects Mersault in its connection to the earlier setting of his mother's
funeral. 

While Mersault is emotionally affected by a number of settings in
the novel (as evidenced by the thoughts presented in his inner , if not by a traditional or
overt sentiment), the overbearing sun at the beach causes Mersault to commit murder. 

When Mersault's mother dies, he sits in vigil at her rest home then participates in the
funeral the following day. Bored, annoyed and seemingly oppressed by theof the rest home,
Mersault is again cognizant of a sense of discomfort and oppression on the walk to the burial
ceremony. 

"Evenings in that part of the country must
have been a kind of sad relief. But today, with the sun bearing down, making the whole landscape
shimmer with heat, it was inhuman and oppressive." 

Later at the beach, Mersault becomes aware of the...