Flames destroyed a home in Kihei late Friday afternoon on Oe Street.
Officials say the fire started in the backyard at about 4:30 p.m.
The two-story home was fully involved with crews got to the scene.
Everyone inside made it out safely.
It took about four hours to extinguish the blaze.
Investigators say it was sparked accidentally by fireworks, and it caused a total of $520,000 damage.
The American Red Cross will meet with the residents.