Before the showdown at Mt. Carmel there is a lengthy description of Eliyahu's meeting with Ovadya. Ovadia personifies the dilemma of the nation and foreshadows the outcome of the showdown.  Just like the nation feels that it has two masters - God and Ba'al - so too Ovadya is Ahav's closest minister, but he is also God fearing.  Eliyahu forces Ovadya to make a choice.

At Mount Carmel, Eliyahu seeks to broadcast a message to the entire nation and to activate them. Mount Carmel is chosen as the location for the test between Eliyau and the prophets of the Ba'al as it was a revered site for the worshippers of the Ba'al and because it overlooks the Ba'al culture of Phoenicia to the North and the Kingdom of Israel to the South. The killing of the prophets of Ba'al after Eliyahu's victory raises questions as to Ahav's allegiances in the aftermath of the showdown.

Courtesy of the Virtual Beit Midrash, Yeshivat Har Etzion