The blaze broke out just before 8:00 am at the San Joaquin Estates at Olive and Marks Avenues.
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When fire crews arrived, they found the home engulfed in flames.
Firefighters then worked to contain the fire and keep it from spreading to neighboring mobile homes.
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No one was hurt, and the residents got out safely.
It's believed an electrical problem may have caused the fire, but a formal investigation is underway.