Still waiting to hear the cause.  "Accidental" does NOT say enough.  In 1965 I "accidentally" set fire to my house because I smoked and left a cigarette in an ashtray on the arm of an overstuffed chair.  The chair was the obvious source and except for heat and smoke damage the hole in the floor was the OBVIOUS point of origin.  Even with "accidents" there are usually explanations.  

The fact there are louvres in the doors gives an explanation for the fanning of the flames from the oceanside causing the flames and black smoke leaping out of the mauka side.  With the wind fanning it from makai to mauka, how did the fire spread to the makai side?