The blaze broke out around 4:40pm at a portable building in an industrial area on San Antonio near Hahn Road.
Cy-Fair Volunteer Fire Department spent several hours at the scene and said it was kind of hard to extinguish the fire because firefighters had a little trouble with water supply.
No one was inside the trailer. We're told that the home was actually vacant.
Authorities are still trying to determine what caused the blaze.
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