Southern California wildfires turned into an "Apocalypse Now" as a firestorm raced through the mountain resort of Lake Arrowhead destroying an estimated 250 homes in minutes and leaving officials fearing that the fiery rage would not abate yesterday. Fire officials said the only hope they had for preventing a repeat of Wednesday's disaster on Lake Arrowhead was incoming fog that was expected to creep in from the ocean and envelop the mountains by the week's end.