In "The Stranger", what is symbolic about Meursault's statement, "The blazing sand looked red to me now." ?

In Albert Camus' "The Stranger" the intense heat has worn Meursault out, so the prospect of walking up the stairs to face the women seems just as tiring as continuing to walk on the hot beach.

I'm probably wrong about this, but I think it may be that red=blood/danger so it's foreshadowing the death of the Arab.